6066 (1960-1966) GMC Truck Club Bitcoin now accepted here! 
Pay Dues
Pay Dues or become a Site Supporter
 



Go Back   6066 (1960-1966) GMC Truck Club > 6066 GMC Truck Club Forum > GMC V6 and V12 Engines


GMC V6 and V12 Engines Engine repair and rebuilding

Reply
 
Thread Tools
  #11  
Old July 19th, 2015, 09:36 PM
TJ's GMC's Avatar
TJ's GMC TJ's GMC is offline
Senior Member
 
Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
Posts: 1,341
Rep Power: 399
TJ's GMC is on a distinguished road
Default Re: 305a V6 ignition parts

Actually the 230-250-292 had screws to hold the cap down and were internally adjusted. The older 216-235-261 had the externally adjusted dizzys and the snap on straps to hold the cap down. Nice to know what truck my 305 was out of. It had that governed dizzy.
__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600


My youtube channel aka Military Chevy:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #12  
Old July 19th, 2015, 09:51 PM
AZKen's Avatar
AZKen AZKen is offline
Senior Member
 
Join Date: Jul 2014
Location: AZ
Truck: 6066GMC
Posts: 1,605
Rep Power: 513
AZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really nice
Default Re: 305a V6 ignition parts

My 1963 Chevrolet Truck Shop Manual shows 6 cyl 230, 292 Distributor cap as spring loaded retention and external/window adjustment as previously posted.


My 305A and 305E have the exact same Dizzy/cap/rotor/etc. Spring loaded cap, external adjust.

Last edited by AZKen; July 19th, 2015 at 10:03 PM.
Reply With Quote
  #13  
Old July 19th, 2015, 10:52 PM
AngryPirate's Avatar
AngryPirate AngryPirate is offline
-= Dues Paid =-
 
Join Date: Jul 2014
Location: Austin, TX
Truck: 1960 GMC 1/2 ton SWB Fleetside
Posts: 61
Rep Power: 76
AngryPirate is on a distinguished road
Default Re: 305a V6 ignition parts

Quote:
Originally Posted by Ed Snyder View Post
Scott -- Do you know if you still have the original 305A, or has it maybe replaced with a later 305E with the smaller distributor?

Ed
Original 305a. Not sure about the distributor though. I'll have to pull a part # off of it.
Reply With Quote
  #14  
Old July 19th, 2015, 11:02 PM
AngryPirate's Avatar
AngryPirate AngryPirate is offline
-= Dues Paid =-
 
Join Date: Jul 2014
Location: Austin, TX
Truck: 1960 GMC 1/2 ton SWB Fleetside
Posts: 61
Rep Power: 76
AngryPirate is on a distinguished road
Default Re: 305a V6 ignition parts

Quote:
Originally Posted by Jim A View Post
The thing I like about the various forums I visit, including this one, is the tradition of almost unfailing courtesy and helpfulness.
I don't read every post so there may be some "history" between Pirate and Ken that I have missed.
If not, then the courtesy I expect seemed a little strained here.
I hope it is a one-off.
I appreciate almost any reply, and I suppose that I have only one post on this forum may have prompted Ken's response. I guess I was taken aback when I saw the "you should really try the Internet" response when I have done lots of digging and I was posting here in case it was some gmc (not Chevy) weirdness with the distributor and other ignition parts. I was baffled when I kept getting the incorrect parts and before I attempted again I was wondering if someone else had experienced this weirdness and had some insight or possibly some online purchase history that could yield a specific part number.
I guess I took the response the wrong way and I apologize to Ken.
I always search the forum for the answer before posting my own thread. I just didn't see anyone else having an issue with finding correct parts is all.
I am always very gracious for any help, but I guess I have a hot button when it comes to any (my) perceived condescending comments.
Apologies for the misunderstanding
Reply With Quote
  #15  
Old July 19th, 2015, 11:06 PM
AngryPirate's Avatar
AngryPirate AngryPirate is offline
-= Dues Paid =-
 
Join Date: Jul 2014
Location: Austin, TX
Truck: 1960 GMC 1/2 ton SWB Fleetside
Posts: 61
Rep Power: 76
AngryPirate is on a distinguished road
Default Re: 305a V6 ignition parts

Quote:
Originally Posted by AZKen View Post
Here is some info from a GMC enthusiast and expert:

GMC v6 engines came with one of 3 different dizzies. First the externally adjusted style. Just like the 230-250-292 stuff. It has the spring arms to hold on the cap.
Next is the internal adjusted style. More or less the same as the later 235-261 Chevy and jimmy 248-270 302. Screw on cap.
Third is the externally adjusted dizzy with the governor control. This has 2 vacuum ports and is taller under the cap. These came on 1-1/2 ton and larger.
There seems to be no rhyme or reason for use of the first two styles. Though the externally adjusted caps seem a bit more common. Both styles have appeared on all series of 305 engines.
Noted. Thanks for the response.
Next time I'm at my truck I'll pull the ignition parts and post them, for future reference.
I'll dig into the information above.
Thanks again.
Reply With Quote
  #16  
Old July 20th, 2015, 02:13 AM
jagarra jagarra is offline
-= Dues Paid =-
 
Join Date: Apr 2014
Location: Reno, NV
Truck: 1962 Custom Wideside SB
Age: 78
Posts: 250
Rep Power: 130
jagarra is on a distinguished road
Default Re: 305a V6 ignition parts

When I was getting parts for my 62 with a 305 D motor I used the Napa on line site to do my parts research. After I selected my year truck on the site I could then select my local store. Then I could peruse inventory and see what was in stock. Everything I needed for the dizzy was in stock, worked correctly. What really took me back a bit was how expensive the externally adjusted points and matching cap were. But from experience, Napa has top quality ignition parts so I got the best for my baby.
Reply With Quote
  #17  
Old July 20th, 2015, 03:04 AM
AZKen's Avatar
AZKen AZKen is offline
Senior Member
 
Join Date: Jul 2014
Location: AZ
Truck: 6066GMC
Posts: 1,605
Rep Power: 513
AZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really nice
Default Re: 305a V6 ignition parts

I do a lot of "shopping" on line to get part numbers and pictures, and after many corroborating facts, I then try to find the parts locally so as to touch and feel and compare before buying. Just as Jagarra said. I have found that some online retailers are easy and fair regarding returns. I don't use any of them unless I have to or the price is way low. Amazon seems good for returns. RockAuto is NOT. I don't use them anymore for purchase but really, really, good for part numbers. As I said way back, buy at a store near if you can. I have learned to do cross referencing on the internet. It has taken a lot of time to learn how to do that to end up with the part at O'Reilly's. They do not always have an old truck part listed on their site or computer. Their dates don't go that far back sometimes. I am speaking of all kinds of old trucks/cars I have worked on, not just GMC. Places like O'Reilly's will take back a part, no questions asked especially if you have built up a rapport.

Last edited by AZKen; July 20th, 2015 at 03:10 AM.
Reply With Quote
  #18  
Old July 21st, 2015, 03:49 PM
TJ's GMC's Avatar
TJ's GMC TJ's GMC is offline
Senior Member
 
Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
Posts: 1,341
Rep Power: 399
TJ's GMC is on a distinguished road
Default Re: 305a V6 ignition parts

Quote:
Originally Posted by AZKen View Post
My 1963 Chevrolet Truck Shop Manual shows 6 cyl 230, 292 Distributor cap as spring loaded retention and external/window adjustment as previously posted.


My 305A and 305E have the exact same Dizzy/cap/rotor/etc. Spring loaded cap, external adjust.
Maybe I'm mixing up what your calling Internal an External adjustment. lol You meaning turning the dizzy back and forth to set the timing? Or are you referring to the vacuum or mechanical advance?
__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600


My youtube channel aka Military Chevy:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #19  
Old July 21st, 2015, 09:09 PM
AZKen's Avatar
AZKen AZKen is offline
Senior Member
 
Join Date: Jul 2014
Location: AZ
Truck: 6066GMC
Posts: 1,605
Rep Power: 513
AZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really nice
Default Re: 305a V6 ignition parts

Points adjust thru "window" built into dizzy. Dwell. How could you interpret turning dizzy as internal/external adjustment?
Anyway sounds like OP is on track.
Reply With Quote
  #20  
Old July 22nd, 2015, 04:08 PM
TJ's GMC's Avatar
TJ's GMC TJ's GMC is offline
Senior Member
 
Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
Posts: 1,341
Rep Power: 399
TJ's GMC is on a distinguished road
Default Re: 305a V6 ignition parts

Quote:
Originally Posted by AZKen View Post
Points adjust thru "window" built into dizzy. Dwell. How could you interpret turning dizzy as internal/external adjustment?
Anyway sounds like OP is on track.
My bad. Never had an engine with the dwell window. Though I have heard of them.
__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600


My youtube channel aka Military Chevy:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
Reply

Bookmarks

Tags
ignition, v-6

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
305A Parts AZKen 1960-1966 GMC Marketplace 12 September 28th, 2015 12:13 AM
305A parts in AZ AZKen 1960-1966 GMC Marketplace 0 February 13th, 2015 10:57 PM
305A-478M V-6 Rebuild parts. . . Archiver Previous Forum Posts 0 November 6th, 2009 12:25 AM
Re: [6066 GMC Truck] 305A plus parts available Archiver Previous Forum Posts 0 June 19th, 2001 01:44 AM
305A plus parts available Archiver Previous Forum Posts 0 June 17th, 2001 01:52 AM


All times are GMT +1. The time now is 02:12 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 681711554703|1710508351|0