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#1
04-24-2011, 09:16 PM
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1967 302 crank
I have what I believe is a 1967 small journal 302 crank. In some books this crank (#3876764) is described as a cast (not forged) 283 crank. Does anyone else have a 302 crank with this number ? Where several different crank numbers used in 1967, and later over the counter ?
 
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Anders Stålklint. After selling my COPO 9561 I´m now a "postman" with the main project being a 1966 327 2 dr sedan Chevy II. 
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#2
04-24-2011, 09:21 PM
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Re: 1967 302 crank
As far as I know, that is a 283 only crank. 1967 302 crank is 3815822.
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Day 2 is Life.
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#3
04-24-2011, 10:09 PM
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Re: 1967 302 crank
How come it has the 302 specific cutout in the flange then ?
Was that done on 283 cranks also ? I thought that cutout had to do with different counterweights because of heavier pistons in the 302.
__________________
Anders Stålklint. After selling my COPO 9561 I´m now a "postman" with the main project being a 1966 327 2 dr sedan Chevy II.
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#5
04-25-2011, 02:05 AM
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Re: 1967 302 crank
The crank that you have is a 283 forged/cast.The 302 crank # is 3815822,but there was another 283 crank that was forged/steel with a cast # 3876768.The 822 crank seems to be specific to the 302 only.
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#6
04-25-2011, 10:02 AM
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Re: 1967 302 crank
Sam, I believe it is like you say, they are pretty much the same.
I had one 302 crank before and I´m sure that one was #3815822. That one also had the cutout on the flywheel flange. No need to take a look in Colvins books anymore. If my #3876764 forged crank was made for a 283 there are too many things wrong in them. 
__________________
Anders Stålklint. After selling my COPO 9561 I´m now a "postman" with the main project being a 1966 327 2 dr sedan Chevy II.
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PeteLeathersac (10-31-2021) | ||
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#7
04-25-2011, 12:54 PM
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Re: 1967 302 crank
your steel 283 crank should work in your 67 302. Put it in and rev it up Copo!
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| The Following User Says Thank You to Salvatore For This Useful Post: | ||
PeteLeathersac (10-31-2021) | ||
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#8
04-25-2011, 09:32 PM
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Re: 1967 302 crank
The 822 crank was used in 283's as well. I have had several of them. The 302 crank is tuffrided and the 283 cranks were not. Other than that there is no difference. I have a picture somewhere of an 822 302 crank in between 2 822 283 cranks somewhere if I can find it.
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Russ
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PeteLeathersac (10-31-2021) | ||
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#9
04-25-2011, 11:15 PM
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Re: 1967 302 crank
Russ, how would you spot a 302 crank in between two 283 cranks if they are all #822 cranks ? I guess I should let a reputable engine shop fix my crank and have it tuffrided then ?
I was thinking of putting in a thickwall Chevy II 283 block with high comp pistons and use it in the -66 2-door sedan. I´ll rev it up Sam ! [img]<<GRAEMLIN_URL>>/  [/img]
__________________
Anders Stålklint. After selling my COPO 9561 I´m now a "postman" with the main project being a 1966 327 2 dr sedan Chevy II.
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#10
04-26-2011, 03:48 AM
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Re: 1967 302 crank
The counter weights on the 283 cranks are black from oil stain but the 302 cronk is more silver where the treatment hardens the surface and the oil doesn't penetrate I guess.
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Russ
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