Gm 307

I'm building a very budget 54 and I already had a 307 laying around so I decided to stuff it in. Almost everybody talks bad about these motors but why. I only intend to run it until I graduate and can afford something better. Is there anything I need to be cautious of when I finally get ready to crank and run it? Any info on it aside from "those motors ****" would be greatly appreciated.

 

Fat Hack is a savant when it comes to alot of the odd motors, and he did a post on these some time back. Hope this helps you out...here is the link.
http://www.jalopyjournal.com/forum/showthread.php?t=45615&highlight=perfume

 

There's really nothing wrong with a 307, it's basically a 283 with a 350 crank. The small bore will shroud valves if youre going for a max performance build. But for a cruiser, the 307 is fine.

 

but I wonder, is it a Chevy 307 or and Oldsmobile 307?

 

No. The 307 had the 3.25 stroke of the 327.

 

Bore it to 4" and you got a 327, or destrke it with a 283 crank and you got a 283, or do both and you got a 302! Wow, imagine the posibilitys!

 

cool intake, cool valve covers (to use on later engine) and none of the "307's ****" crowd will no the difference......tell them it was a crate 350......then they'll say why didn't you go different.......

serious though, I've always thought I'd like to put a 305 or 307 in something and tell the idiots it's a 355, with roller this and that......watch 'em walk off.....*****s!

 

My cousin built a .040 over 307 with a 375 horse solid Vette cam and a performer intake the rest was stock. It was in a 70 Nova w/ a 3speed and a cheap floor shifter and 3.43 gear set.Street light to street light the big inch motots didn't have much for him.

Jerry

 

307's are great motors !....run whatcha got.

 

if that's what you got then run it! it's a decent engine to cruise in

 

They got a bad rap because of an issue with soft cams. Other than that they are a typical SBC. If it's a sound engine, good compression, decent carb and ignition they will provide thousands ot miles of trouble free transportation. When you wear it out after a coupe of hundred thousand miles take out the crank, find yourself a 350 block and build a kick *** 327.


Frank

 

Thanks everybody. To tell ya more about the motor, I bought it for 75 smackers...it a powerglide, performer intake, and some awesome (not really)chrome Edelbrock valve covers... I think the valve covers are the 15 horse models. Really though I think the guy told me he put something like a Comp. 268 or something like that in it. Thanks again.