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Are you sure that's a BBC crankshaft? Somehow the keyways don't look right.

 

That does not look like a big block chevy crankshaft.

 

Looks more like a Chrysler Big block 413-440 RB stroker crank.

 

If I am wrong let's identify it. I'm going off what another member said. Would a picture of the flywheel flange help? If it a different crank what's it worth so I can find a new home for it.

 

It appears to have an 8-bolt flange on the back; definitely NOT BBC. I know the Mopars used that pattern. How about the casting #? Then we could solve the mystery. Thanks, Bob.

 

There are no casting numbers or lines on the crank. Only numbers are whats stamped into the counterweight that I listed in the original post. Its aftermarket but I don't know by who.

 

 

Hey MAN

Why did you not take it to a machine shop
the ones I saw with 2 keyways were on blower engines Just saying

This is NO an Oldsmobile part

 

It's NOT listed as an Oldsmobile part.

 

OK
tell me what it is

douce

 

This was an Oldsmobile website..

 

"Non-Oldsmobile Classified"

 

Rods are 2.38 and mains are 2.70 if this helps anyone I'd this crank. This is with tape and a tape measure then divide by π

 

Why don't you do some research & look at the Chrysler crank I mentioned.... Maybe you will find your answer.
I'm trying to help you, but it is your responsibility not to misrepresent something, not mine.

There is not a casting number because it is not a CASTING but an aftermarket forged crank.
Aftermarket cranks did not typically have forged in numbers but stamped numbers as you showed..

It has a dual keyway as it was likely built for a supercharged application.

 

Reposted thread closed

Found out it's a top fuel crank that can't be run in a street motor unless machined for pilot bushing/ torque converter