forged crank vs nodular crank block

forged crank vs nodular crank block

I found that out the hard way and was lucky enough to find a later crank virgin and spun it down .010
right now I am fitting the wilco trans adapter and running a gm 700r4 with corvette HS lock up torque
2300 rmp

Charrlie_S said
The pilot hole in the end of the crank got larger in 1968. You can use the late trans/converter as is, or the early trans/converter by using a inexpensive bushing. If using the early crank, you must use the early trans/converter, or an expensive custom converter to use the late trans.