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#14923 08/27/2004 9:02 AM | Joined: Aug 2004 Posts: 7 Junior Member | | Junior Member Joined: Aug 2004 Posts: 7 | Got an old Chevy pickup and a good old 305E V6. Anyone have any idea what I'm going to run into when I mix them? The 50' Chevy has the SM420 4-speed and currently has a blown 235 (blown as in junk---not supercharged!) Thanks! | | |
#14924 08/27/2004 10:10 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Doesn,t sound good to me. That v6 was a big heavy thing. It had low end torque but very low on power. It would probably bolt up to the trans. using the v6 bell housing. you would have to fabricate engine mounts. A v8 would make a much better conversion. 
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#14925 08/27/2004 11:21 PM | Joined: Apr 2002 Posts: 1,571 Shop Shark | | Shop Shark Joined: Apr 2002 Posts: 1,571 | Those old V6s are cool, though. And if you need to move a small building, you'll have plenty of torque!  | | |
#14926 08/28/2004 3:03 AM | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | I would rate it very high on the "cool scale". | | |
#14927 08/28/2004 3:16 AM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | One thing to remember is that the 305 is about the same rpm engine than the 235. Crankshaft balance is horrible. If you run the engine at sustained revs over 2,700 rpm you will end up with a rod through the block. I know from lots of experience working lumber yards in the late 60s to mid 70s.
And parts are hard to come by.
Besides the gobs of torque, they do have another advantage. You can usually get a running 305 out of a pickup for free.
Fred
52 3600
69 C-10
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#14928 08/29/2004 8:34 AM | Joined: Aug 2004 Posts: 7 Junior Member | | Junior Member Joined: Aug 2004 Posts: 7 | Thanks for the input! I will be using the v6 for a couple of reasons. First, I already have it. Second, I really love peculiar engines, and the GMC v6 is most definetly that. At a later date (read as money becomes available) I will be either changing my ring and pinion (I understand that I don't have a lot of options on that) or adding an overdrive unit. Until then, the truck will be used primarily for utility and more or less limited from highway use, so I don't plan on running it out too hard. What I really was hoping for is that someone has done this before and already has dimensions on mounts or knows of some weird combination that requires minimal modification. Otherwise, this definetly won't be the first time I've had to fabricate parts! | | |
#14930 08/29/2004 8:14 PM | Joined: Feb 2004 Posts: 29,805 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,805 | Stock up on aspirin. Those engines are a PITA!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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#14931 08/31/2004 3:10 AM | Joined: Apr 2000 Posts: 179 Shop Shark | | Shop Shark Joined: Apr 2000 Posts: 179 | I did see one in 1 1/2 ton AD on e-Bay once, so it can be done. At a minimum I expect you would need to fab the engine and bell housing mounts from scratch, but the SM420 should bolt up to the bell housing. You would definitely be different than most. I've had several 305s over the years and had good luck with them, but I agree that they don't hold up well at high rpms.
Joe McNeel
http://mcneelnet.com/~jmcneel/59.html
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