Free 225 stuff in California

I'm looking for a crank for my 1967 b body , i was researching the cranks and i think the crank
3830099 from a later year has a bigger rear hole on the crank so i can install my later tranny with a lock up
if anybody knows if I'm on the right track, give me a heads up
Well I picket up the 225 from Limedust70 on Saturday.The person from the original post never got to me. I'm slowly tarring the engine apart haven't really looket at the crank but I'm thinking of rebuilding it. I'll let you know if the number match or what I see. And I wouldn't be able to tell you if your info is right I'll keep in touch