gm big block v6?

[TnSnapp]

I have fooled around with Chevy engines all my life but never knew such an animal existed. Any of you guys got one of those put up or running one currently?

 

[bucket]

You mean the old GMC V6?

 

[Shorty81]

You mean the old GMC V6?

That was a GMC only truck engine. I believe it was a 305. I think late 50s through 68.

 

[legopnuematic]

305 351 401 and 478 CI for the GMC 60 degree V6

 

[TnSnapp]

You mean the old GMC V6?

yes there is a 71 model GMC 3/4 ton for sale near me that has this motor.

 

[TnSnapp]

yes there is a 71 model GMC 3/4 ton for sale near me that has this motor.

I believe the ad said 401 ci?

 

[1987 GMC Jimmy]

Don’t forget the 702 Twin Six. Not exactly the same thing, but it looks like they got two of them and put them together.

 

[TnSnapp]

Don’t forget the 702 Twin Six. Not exactly the same thing, but it looks like they got two of them and put them together.

I have never seen one, would like to see and hear one run, and of course drive it also

 

[1987 GMC Jimmy]

I have never seen one, would like to see and hear one run, and of course drive it also

There are some videos on YouTube, but they only made 5000 so the pickings are slim.

 

[TnSnapp]

There are some videos on YouTube, but they only made 5000 so the pickings are slim.

The truck I am talking about was a former wrecker according to ad. dual rear wheel so it must be ton.

 

[broketiredugly]

305 351 401 and 478 CI for the GMC 60 degree V6

good place to find a blower for parts?

 

[MrMarty51]

I have never seen one, would like to see and hear one run, and of course drive it also

Years ago I had a 1967 GMC with the 305 V6. I run straight pipes on that truck. It had the cooles sound, almost like an airplane cruising.
The 305 was not huge on power but they would run forever.
There also were diesel in this engine design. Not sure what internals was different but pistons for sure.
There was also different head configurations, some with higher compression and bigger valves.
I got a set of the better heads and installed them onto My engine.

 

[TnSnapp]

Years ago I had a 1967 GMC with the 305 V6. I run straight pipes on that truck. It had the cooles sound, almost like an airplane cruising.
The 305 was not huge on power but they would run forever.
There also were diesel in this engine design. Not sure what internals was different but pistons for sure.
There was also different head configurations, some with higher compression and bigger valves.
I got a set of the better heads and installed them onto My engine.

yea the valve covers remind me of 409 chevy. just thought it was cool. wondered if some of these guys had one running in their rig.

 

[ditzr]

There is a fellow on youtube that is an engine rebuilder and did a series on rebuilding one of those engines.. you can search "myvintageiron". he does a lot of interesting videos on all makes.

 

[ali_c20]

Friend of mine has 305 gmc suburban manual 3 gear transmission, sounds awesome.