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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 75 C20 on July 20, 2008, 03:40:23 pm

Title: better off?
Post by: 75 C20 on July 20, 2008, 03:40:23 pm
I am working on a 327 for my 68c20- i know wrong generation but anyway- i have a 350 block that i was gonna use, get a 307/326 crank and put a maybe 30 over rebuild kit in it. but then iwas on summits webpage and i saw i could get a brand new gmpp 4inch bore block for 600 which got me thinkin- so i went to napa and priced a crank which is around 200 for a reman. Do you guys think i would be better off to get a brand new block and crank instead of messing around with boring the old one out and probly have to have the old crank milled down? i was figuring it would be kinda nice to start with something new and fresh but i dont know which would be better? wutta think?
Title: Re: better off?
Post by: VileZambonie on July 20, 2008, 05:52:53 pm
If you wanna spend $800 on a block and crank when you already have a block seems like a waste of $ to me. Typical crank grind is under $100 bucks same end result.
Title: Re: better off?
Post by: choptop on July 20, 2008, 06:01:41 pm
Arent there special bearings drequired for this. The 307 crank is small journal I think, and has to have oversized bearings to put in a 350. I have several 307 cranks, and have thought about doing the same thing
Title: Re: better off?
Post by: 75 C20 on July 20, 2008, 09:23:55 pm
Arent there special bearings drequired for this. The 307 crank is small journal I think, and has to have oversized bearings to put in a 350.
i think that the 307 is the large journal crank
Title: Re: better off?
Post by: Captkaos on July 21, 2008, 10:49:22 am
The 307 is a large journal crank.
Title: Re: better off?
Post by: choptop on July 21, 2008, 07:24:12 pm
It is the same stroke as the 327 though, right?
Title: Re: better off?
Post by: Captkaos on July 21, 2008, 08:01:49 pm
Yes, it is the same as a large journal 327 crank.