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  #21  
Old December 31st, 2016, 06:08 PM
Dazzoman Dazzoman is offline
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Originally Posted by David R Leifheit View Post
Interesting idea. But not correct.
In 1963 only, GMC put an overlay (kind of a "decal" if you will) on some valve covers. Never heard anything about Scots having anything to say about "endorsing" it.



I don't think GMC put 283s in any of their trucks.
And I would guess it would make a difference as to what you want to do with the truck as to what engine to put in there. If you want it to pull or haul (ie. work) then the 305/351 are good choices. A lot of low end torque. If you are using it like a car, then maybe the 350. But why? Put a Chev. drivetrain in it and it isn't really a GMC anymore.
Unless you have a Canadian truck. GMCs built in Canada were, essentially, Chevrolets with GMC badging.
Good point ! I used mine with an camper on it for years so I didn't need the torque even tho I put in a 292 that has an long stroke ....
For your truck it is essential that you (lucky dog) get to justify an 305 . But I keep forgetting that GMC was the ones that "put the bolts on " whereas Chevy just made em. GMC was the industrial division until they were bought out by Chevy or something in 1967 they became one deal .I should be more into the real GMC concept but oh well .
I would get the 305-E which is a tad bigger .
Toms will probably have a core since they have the big 60 series stuff there or an old Cocacola truck or something with that motor in it :0)
Oh and yes I have seen the Scotts valve covers just once back in the 70s and it was very rare .... I am in my 50s now so young man you'll have to believe us old folk when we say we saw it ha ha ha !

Last edited by Dazzoman; December 31st, 2016 at 06:18 PM.
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  #22  
Old December 31st, 2016, 06:20 PM
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David R Leifheit David R Leifheit is offline
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I would get the 305-E which is a tad bigger .
In what way do you think the 305-E is "bigger"?

305A-305E are all the same displacement and use relatively the same parts.

The 351 is bigger, and oddly enough was stock in many 1966 GMC 1000 series trucks (1/2 tons). While the 305 was still put in bigger trucks, I had a '68 GMC 5500 with a 305E in it for a while.
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  #23  
Old December 31st, 2016, 06:22 PM
Dazzoman Dazzoman is offline
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Originally Posted by David R Leifheit View Post
In what way do you think the 305-E is "bigger"?

305A-305E are all the same displacement and use relatively the same parts.

The 351 is bigger, and oddly enough was stock in many 1966 GMC 1000 series trucks (1/2 tons). While the 305 was still put in bigger trucks, I had a '68 GMC 5500 with a 305E in it for a while.
Right again . Its been a while since I touched a 305 .
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  #24  
Old December 31st, 2016, 06:48 PM
bigblockv6 bigblockv6 is offline
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And GMC was never bought out by Chevy, that's impossible when both are General Motors products to begin with. This was all about cutting production costs and interchangeability between both divisions.:lolsmack
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  #25  
Old January 30th, 2017, 02:01 AM
bluestreak1854 bluestreak1854 is offline
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Oredigger, I have a 478magnum with a allison auto with everything need to install it-- has 8696 miles-- also have a 5peed main and 4speed brownlite with od a 305e also-- like to sell any of it
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  #26  
Old February 3rd, 2017, 03:07 AM
hubarlow hubarlow is offline
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Oredigger, I have a 478magnum with a allison auto with everything need to install it-- has 8696 miles-- also have a 5peed main and 4speed brownlite with od a 305e also-- like to sell any of it
BlueStreak: How much for the 478? I might be interested if I can come up with the money.
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  #27  
Old February 3rd, 2017, 04:29 PM
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Originally Posted by bigblockv6 View Post
And GMC was never bought out by Chevy, that's impossible when both are General Motors products to begin with. This was all about cutting production costs and interchangeability between both divisions.:lolsmack
GMC actually Bought Chevy back in 1917 give or take a couple years. I don't remember the exact. GMC was known as General Motors Truck and Chevrolet was an entirely different corporation for a short time. Then GM bought Chevy and all the others through the years and became GMC.
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  #28  
Old February 3rd, 2017, 04:37 PM
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Originally Posted by Dazzoman View Post
Oh yes holiday traffic is horrible !
Hot tip for you - contact Tom at Tom myers truck wreckers in Miami Oklahoma and he will send you an original 60s bumper . I got mine from him ( not shown in my pic because I still had the OEM white bumper that I sold this week for $75 on the truck ) but now I have an OEM chrome bumper I got from him for 150$ he shipped it to me . So i pulled out the 305E V6 this truck had in it originally because it wouldn't miss an gas station , the 305E is an bigger one that most so you might not wanna do that unless gas isnt an issue .
Funny , in 60-62 , GM painted plaid shirt pattern on the valve covers of the light trucks and nick named it "The Scotsman" engine until they found out the Scots , known for their frugility would not ever endorse such an engine so they pulled that idea away ha ha ha !
In 1987 I put an 292 straight 6 in it and have drove it like that since and yes an big increase in mileage was the first notable thing (w/ that original Muncie 4 spd I left in there ) .
Well that muncie finally died this yr and I researched and found I could probably put in an NP440 4 speed ( with overdrive on 4th ) and the gas mileage was increased like crazy .
I have decided to put in an 350 v8 this month and its going to be perfect for that NP440 MY6 tranny .
All that to say you should get away from the v6 because of the gas .
**** , Chevy put 283s in your truck with the same Muncie tranny with no problems .
Today you could put an modern 350 in there w/ all the trimmings :-)
You couldn't be further from the truth. The 305 v6 gets decent mileage when the proper tuning is done. And putting a taller rear gear in helps a ton as well. These engines like operating at 2000 rpm. People have gotten 16 MPG with these with some tuning and a taller gear.
The 305E is no bigger than the 305A-D. Only difference is that in 1966 they had 10 more horse power. Cam profile changed I think.

Pushing the idea of throwing v6's away isn't the idea of this forum.....as you may have noticed this forum was built ABOUT v6's. So, if you are going to try and tell people to scrap perfectly good engines then I suggest subscribing to a Chevy forum. Just my two cents.
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Last edited by TJ's GMC; February 4th, 2017 at 05:26 AM.
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  #29  
Old February 4th, 2017, 02:04 AM
hubarlow hubarlow is offline
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"The 305E is no bigger than the 305A-D. Only difference is that in 1968 they had 10 more horse power. Cam profile changed I think."

Not an expert, so I could be wrong on this, but my research seems to show that the difference between the A-D engines and the E series was better flowing heads and intake manifold, bigger two barrel carb, and bigger valves. There may have also been a change in the exhaust castings making them flow better too. Not sure about the cam... Maybe a change there too.
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  #30  
Old February 4th, 2017, 02:08 AM
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Quote:
Originally Posted by hubarlow View Post
"The 305E is no bigger than the 305A-D. Only difference is that in 1968 they had 10 more horse power. Cam profile changed I think."

Not an expert, so I could be wrong on this, but my research seems to show that the difference between the A-D engines and the E series was better flowing heads and intake manifold, bigger two barrel carb, and bigger valves. There may have also been a change in the exhaust castings making them flow better too. Not sure about the cam... Maybe a change there too.
Yep you are correct, my meaning was that the engine is not any Bigger.
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1964 Chevy C20 292/SM420
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