Quote: jim, can you explain how the 4.25 crank fit better than the 4.15? oil pickup boss and cylinder notching? so, what kind of power do's your 440-1 13:1 motor make? whats the car weight and whats it run?
4.15 stroke cranks are made with Mopar rod journal size , 4.25 with BBchevy rod journal , the BB chevy rod size is smaller and fits better. Also there are more options in BBC rod sizes , not so much , especially for the low deck stroker , in BB mopar rods.
The 4.25 is the way to go, the standard CH of a low deck piston is 1.32 , you can build the 451 , 470 and 511 with that same piston by just changing the rod length to go with the appropriate crank stroke.
