can u guys help me id this crank I got it with a car I bought supposed to be a low deck stroker crank its brand new in the box PN 3751886 can't find anything online but looks like a factory crank to me.has 400 stamped right on one of the counter weights.wont let me post a pic....

It is a factory '73-'79 400 cast crank for auto trans.

Bummer, you have bought a stock 400 cast crank. I hope you didn't pay more than $50 for it. I got my stock 440 cast crank for $75 several years ago.
Central Jersey Motor Parts has one in stock.

I hope you can get partial reimbursement for the crank if it was misrepresented.

The 400 will probably be cast onto the edge of the first counterweight. My 440 crank has a 440 in that same location.

Your crank is not a Mopar Performance part as their part numbers always start with the letter P.

That crank will work in a 361, 383 or 400. Main journals 2.625", rods 2.375", stroke 3.38". With stock weight pistons and rods the use of a cast crank 383 or 400 harmonic damper and weighted flywheel or torque converter will be necessary.

R.

ya thats what I figured.....never even knew they sold stock cast cranks brand new...and it was free with the purchase of the car so might be of good to someone. what is it worth?gotta cost more than $50 new.