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Old 01-13-2008, 02:55 PM
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283 crank journal question

is there a large journal for a 283

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Old 01-13-2008, 03:02 PM
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no only small
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Old 01-13-2008, 03:17 PM
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is there a diff from the chev and the gm these is the shaft number gm173876768
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Old 01-13-2008, 04:18 PM
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Every shaft, head, intake, be it chevy, pontiac, buick, Caddy, Oldsmobile, they all had GM casted on them as they were all a division of GM.
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Old 01-13-2008, 04:30 PM
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283 crank

NO large journal 283 cranks, but there are "thick" bearings to put 283 cranks in large journal blocks. I see you're over on JJ.com looking for a 283 crank also. What's your plan? You should be able to find a 283 crank in Ohio, and should be able to get a crank kit from any auto parts outlet; or go to any automotive machine shop; they will probably have several "waiting" to be used.
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Old 01-13-2008, 09:41 PM
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Put a 69 302 crank in a 307 block...You've got a large journal 283
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Old 01-13-2008, 10:20 PM
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TRW used to sell thick bearings and/or spacers.

I don't think I would use up an original 302 crank for anything other than a 302!
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Old 01-14-2008, 07:08 AM
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Quote:
Originally Posted by johnnya
Put a 69 302 crank in a 307 block...You've got a large journal 283
Right, try and find one of those .

Vince
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Old 01-14-2008, 09:52 AM
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Couldnt you have the journals welded up and then machined back down to the size you wanted either medium journal or large journal? I would liike to put a 283 crank in a 400 block to make an 11,000rpm screamer, might not last long but it would be fun while it lasted.

Shane
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Old 01-14-2008, 12:59 PM
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"don't think I would use up an original 302 crank for anything other than a 302!"&
"Right, try and find one of those "
.
That's, why I ,put a smiley after my comment...
.
I think there are aftermarket 3" cranks available. Probably in either 350 or 400 journal sizes.
JA
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Old 01-14-2008, 01:19 PM
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Kind of off topic but the l99(baby lt1 4.3 v8) used a 3 inch stroke crank, so someone could make an lt-302 if they wanted too.I personally feel that this should have been an option on the lt1 z28s.

Shane
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