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
  #1  
Old August 13th, 2017, 08:36 PM
1972RedNeck 1972RedNeck is offline
Member
 
Join Date: Dec 2016
Location: Townsend, MT
Truck: 1965 GMC 5000 6X6
Age: 27
Posts: 95
Rep Power: 69
1972RedNeck is on a distinguished road
Default Found Some Goodies...

Ran to Idaho last week to pick up some parts for my '72 K20...

IMG_20170807_201520[1].jpg

IMG_20170807_201551[1].jpg
Reply With Quote
  #2  
Old August 13th, 2017, 09:23 PM
bigblockv6 bigblockv6 is offline
Senior Member
 
Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,325
Rep Power: 415
bigblockv6 will become famous soon enoughbigblockv6 will become famous soon enough
Default Re: Found Some Goodies...

Looks to be a 67 305E with cross member, you got the right parts for the conversion. One question to ask you is will you be using the 305E water pump housing rather than the one from the 478M? The 67-72 trucks are a lower profile design and in order to use a belt driven fan you will need the lower mounting 305E water pump housing which will also require eliminating the 3 piece timing gear set and replacing it with the 305,351 or 379 double roller chain & sprockets, I went through this with my 478M conversion on my 68 K2500. I wasted a lot of time on trying to modify the light duty water pump housing to accept the gear drive which ended up in failure twice and 4 hacked up housings. Finally I broke down and switched to the double roller chain drive which works just fine in the light duty application. You will have to cap of the center idler shaft hole with 1 1/8 freeze plug so no oil pressure will be lost. I'll be happy to help with advice on this conversion I've done it.
Reply With Quote
  #3  
Old August 13th, 2017, 10:12 PM
1972RedNeck 1972RedNeck is offline
Member
 
Join Date: Dec 2016
Location: Townsend, MT
Truck: 1965 GMC 5000 6X6
Age: 27
Posts: 95
Rep Power: 69
1972RedNeck is on a distinguished road
Default Re: Found Some Goodies...

Quote:
Originally Posted by bigblockv6 View Post
Looks to be a 67 305E with cross member, you got the right parts for the conversion. One question to ask you is will you be using the 305E water pump housing rather than the one from the 478M? The 67-72 trucks are a lower profile design and in order to use a belt driven fan you will need the lower mounting 305E water pump housing which will also require eliminating the 3 piece timing gear set and replacing it with the 305,351 or 379 double roller chain & sprockets, I went through this with my 478M conversion on my 68 K2500. I wasted a lot of time on trying to modify the light duty water pump housing to accept the gear drive which ended up in failure twice and 4 hacked up housings. Finally I broke down and switched to the double roller chain drive which works just fine in the light duty application. You will have to cap of the center idler shaft hole with 1 1/8 freeze plug so no oil pressure will be lost. I'll be happy to help with advice on this conversion I've done it.
I'll definitely come asking you when I get there. I was planning on using the double roller chain and sprockets. The main reason I got this 305 is so I could strip the 478 down to a bare long block and install all the pickup specific parts (water pump, thermostat housing, alternator bracket, engine mounts, etc).
Reply With Quote
  #4  
Old August 13th, 2017, 10:17 PM
bigblockv6 bigblockv6 is offline
Senior Member
 
Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,325
Rep Power: 415
bigblockv6 will become famous soon enoughbigblockv6 will become famous soon enough
Default Re: Found Some Goodies...

Sounds good to me, these pics I'm posting will resemble what you conversion will look like.
Attached Images
File Type: jpg P1010009.JPG (429.6 KB, Multiple views, 14 clicks)
File Type: jpg P1010012.JPG (418.2 KB, Multiple views, 15 clicks)
Reply With Quote
  #5  
Old August 13th, 2017, 10:43 PM
1972RedNeck 1972RedNeck is offline
Member
 
Join Date: Dec 2016
Location: Townsend, MT
Truck: 1965 GMC 5000 6X6
Age: 27
Posts: 95
Rep Power: 69
1972RedNeck is on a distinguished road
Default Re: Found Some Goodies...

Those pictures have been my inspiration for quite some time.
Reply With Quote
  #6  
Old August 13th, 2017, 11:38 PM
bigblockv6 bigblockv6 is offline
Senior Member
 
Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,325
Rep Power: 415
bigblockv6 will become famous soon enoughbigblockv6 will become famous soon enough
Default Re: Found Some Goodies...

On my upper radiator hose I chose to keep the full three piece setup identical to the original including clamps. If that's not a concern for you a real good clean alternative is to use a 292 inline six upper radiator hose and a 70's to early 80's traditional Pontiac V8 thermostat housing like it this second pic from Bob Brays 67 pickup.
Attached Images
File Type: jpg SNC01185.jpg (810.6 KB, Multiple views, 11 clicks)
File Type: jpg 0214151215.jpg (1.01 MB, Multiple views, 11 clicks)
Reply With Quote
  #7  
Old August 13th, 2017, 11:40 PM
1972RedNeck 1972RedNeck is offline
Member
 
Join Date: Dec 2016
Location: Townsend, MT
Truck: 1965 GMC 5000 6X6
Age: 27
Posts: 95
Rep Power: 69
1972RedNeck is on a distinguished road
Default Re: Found Some Goodies...

Quote:
Originally Posted by bigblockv6 View Post
On my upper radiator hose I chose to keep the full three piece setup identical to the original including clamps. If that's not a concern for you a real good clean alternative is to use a 292 inline six upper radiator hose and a 70's to early 80's traditional Pontiac V8 thermostat housing like it this second pic from Bob Brays 67 pickup.
I got the original 3 piece setup as well. Where did you get your hoses?
Reply With Quote
  #8  
Old August 13th, 2017, 11:49 PM
bigblockv6 bigblockv6 is offline
Senior Member
 
Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,325
Rep Power: 415
bigblockv6 will become famous soon enoughbigblockv6 will become famous soon enough
Default Re: Found Some Goodies...

I got them from NAPA quite a few years ago, I'm sure they're still available from other sources. I took the old metal pipe that was rotting away o a muffler shop and they perfectly replicated the new pipe for me. Other than a few visual enhancements like the Chrome Valve covers, K&N air cleaner, HEI ignition and Holley carb I chose to keep the rest of details spot on to the original factory details right down to the yellow painted exhaust manifolds!Recently I bought an NOS sealed Delco Y59 Battery for it, the exact same type battery it came with when new.
Reply With Quote
  #9  
Old August 13th, 2017, 11:57 PM
1972RedNeck 1972RedNeck is offline
Member
 
Join Date: Dec 2016
Location: Townsend, MT
Truck: 1965 GMC 5000 6X6
Age: 27
Posts: 95
Rep Power: 69
1972RedNeck is on a distinguished road
Default Re: Found Some Goodies...

Quote:
Originally Posted by bigblockv6 View Post
I got them from NAPA quite a few years ago, I'm sure they're still available from other sources. I took the old metal pipe that was rotting away o a muffler shop and they perfectly replicated the new pipe for me. Other than a few visual enhancements like the Chrome Valve covers, K&N air cleaner, HEI ignition and Holley carb I chose to keep the rest of details spot on to the original factory details right down to the yellow painted exhaust manifolds!Recently I bought an NOS sealed Delco Y59 Battery for it, the exact same type battery it came with when new.
I to am going for the completely stock look (outside of HEI and the much needed 4 bbl mod) with well built internals (530+ cubic inches) and maybe a set of custom headers.
Reply With Quote
  #10  
Old August 13th, 2017, 11:57 PM
Ed Snyder's Avatar
Ed Snyder Ed Snyder is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Medford, Oregon
Truck: 1962, 1965, 1967
Posts: 868
Rep Power: 343
Ed Snyder has a spectacular aura aboutEd Snyder has a spectacular aura aboutEd Snyder has a spectacular aura aboutEd Snyder has a spectacular aura aboutEd Snyder has a spectacular aura aboutEd Snyder has a spectacular aura about
Default Re: Found Some Goodies...

Quote:
Originally Posted by bigblockv6 View Post
One question to ask you is will you be using the 305E water pump housing rather than the one from the 478M? The 67-72 trucks are a lower profile design and in order to use a belt driven fan you will need the lower mounting 305E water pump housing which will also require eliminating the 3 piece timing gear set and replacing it with the 305, 351 or 379 double roller chain & sprockets.
Another option for you if you'd rather keep the gear drive is to eliminate the engine driven fan and go to a radiator-mounted electric fan. That's what I did on my '62 Suburban with the 401.

Of course, if you're trying to maintain original appearance, Pete's advice is the way to go.
__________________
Ed Snyder
Medford, Oregon
1962 1000 Pickup 401M & Muncie 318 with overdrive
1962 K1000 Suburban 401M & SM420
1965 2500 Suburban 351C & SM420 with Watson overdrive
1967 CM1500 pickup 351E & NP435
Reply With Quote
Reply

Bookmarks

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
RE: [6066 GMC] V-12 GOODIES Archiver Previous Forum Posts 0 August 5th, 2005 02:41 PM
RE: [6066 GMC] V-12 GOODIES Archiver Previous Forum Posts 0 August 4th, 2005 01:42 AM
RE: [6066 GMC] V-12 GOODIES Archiver Previous Forum Posts 0 August 2nd, 2005 01:51 AM
RE: [6066 GMC] V-12 GOODIES Archiver Previous Forum Posts 0 July 29th, 2005 02:15 PM
V-12 GOODIES Archiver Previous Forum Posts 0 July 28th, 2005 01:42 AM


All times are GMT +1. The time now is 10:05 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 681711554703|1710450337|0