View Single Post
Old 09-01-2008, 04:06 PM   #8
LONGHAIR
just can't cover up my redneck
 
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
Re: 1972 chevy 1/2 ton 307

Quote:
Originally Posted by 88JRFAN View Post
A 350 crank will not fit in a 307. The 307 is an animal all it's own. A 350 crank will fit in a 305 though.
Sure it will. Any of the large journal cranks will fit in any of the large journal blocks. Anything after the journal change in the 327s will work except the 400, they are bigger yet.

265, 283, early302, and early 327 all had small main journals (2.300)
Late 302, late 327, 307, 350 have larger (2.450)
400s are all alone at (2.650)

Besides a 350 crank and a 305 crank have the same stroke anyway. You wouldn't gain a thing.

305s have valve clearence issues with the cylinder wall, so bigger heads are a problem with them. AFAIK the slightly larger bore of the 307 doesn't have a problem with this.

You can do it, but it is not a stock combination, so special piston with a lower compression height would be required. Someone may make them as a stock item, but again it's gonna cost for no real benefit. The same money would get you a lot farther in a 350.
LONGHAIR is offline   Reply With Quote