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Author Topic: better off?  (Read 3777 times)

Offline 75 C20

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better off?
« 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?
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1975 Custom Deluxe 20 350 SM465 2WD Longbed
1979 Custom Deluxe 20 400 SM465 2WD Longbed
1968 Custom Sport Truck 20 327 TH400 2WD Longbed
1985 Silverado 10 305 700R4 2WD Longbed
1969 Pontiac GTO 400 Turbo350
2008 GMC 2500HD 6.0 6spd 4X4 Longbed

Offline VileZambonie

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Re: better off?
« Reply #1 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.
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Offline choptop

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Re: better off?
« Reply #2 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
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76 C10 Choptop,76 C10 Swb
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Offline 75 C20

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Re: better off?
« Reply #3 on: July 20, 2008, 09:23:55 pm »
Quote from: 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 think that the 307 is the large journal crank
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1975 Custom Deluxe 20 350 SM465 2WD Longbed
1979 Custom Deluxe 20 400 SM465 2WD Longbed
1968 Custom Sport Truck 20 327 TH400 2WD Longbed
1985 Silverado 10 305 700R4 2WD Longbed
1969 Pontiac GTO 400 Turbo350
2008 GMC 2500HD 6.0 6spd 4X4 Longbed

Offline Captkaos

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Re: better off?
« Reply #4 on: July 21, 2008, 10:49:22 am »
The 307 is a large journal crank.
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Offline choptop

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Re: better off?
« Reply #5 on: July 21, 2008, 07:24:12 pm »
It is the same stroke as the 327 though, right?
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76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline Captkaos

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Re: better off?
« Reply #6 on: July 21, 2008, 08:01:49 pm »
Yes, it is the same as a large journal 327 crank.
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