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By paul2748 - 9 Years Ago
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Yesterday I was talking with a guy who was building a 292 block with a 312 crank (machined for the 292) for his 58 pickup. He was looking for some early Bird parts because he said to me that the 312 crank required him to get the early Bird parts because the crank was different than a sedan crank
I always understood that the cranks were the same and only the balancer/damper was different and either balancer (Tbird and sedan) fit on any 312 crank.
Is he right - or is it something to do with the crank being modified for the 292
Sorry about the title mistake - should be 312. Cant be changed?
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By NoShortcuts - 9 Years Ago
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I know of no difference between a passenger car 312 crank and a crank from a '56 or '57 'Bird 312, Paul. I've never heard anyone talk of any differences between them either.
The dimensions of the snouts for the 292 and 312 cranks are the same for whatever vibration damper you're using, too.
As far as machining the 312 crank to fit in the 292 block, the diameter of the mains, rear oil seal surface, and the rear oil slinger need to be changed.
Click the link below for the dimensional diagram that shows the 292 and 312 crankshaft dimensions from JM's web site.
http://ford-y-block.com/crankshaftid.htm
Hope this helps. :}
Regards,
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