mopar crank help needed

[69 charger man]

hey... i was wondering if the mopar b and rb cranks are the same... the reason why i am asking is that i have a steel crank from a 383.. and i am rebuliding my  76 440 cast crank... so should/ can i swap the cranks out

-thanks ray

[firefighter3931]

The quick answer is no....the B crank will not work in the RB block. The cast crank is good for 500+ hp as long as everything is well balanced.

Ron

[beenaround]

the rod bearings are the same but the mains are like a 1/4 inch difference!

[Kryp2nitE]

not to mention stroke!

can anyone ID a crank with the #'s 3751888

[Chryco Psycho]

if it has # cast into it it must be a cast crank

[Kryp2nitE]

ahhhh probably shoulda thought that one out b4 i posted 

[John_Kunkel]

3751 888 is a cast crank from a  73-78 440 passenger car.