OA186100...............partial VIN, any way to tell what car this came out of ?

PP833 3084 231..................These are the other numbers, I know what those are.

18 or 23-spline?

it is from a 1970 Lynch Rd. Plymouth B-body that was "scheduled" 12/19/69
if the stamping is accurate "3084" is 1/6/70 - - the car was built a little LATE

Thanks 6BBL, it's a 23-spl.

Does it have a big block size bearing retainer or small block ?

there are NOT any 318 4-speed or 340 4-speed B-bodies for 1970 - from a 383HP car

It is indeed big block.

1970 was the first year that Mopar had N.P. change the tail shaft housing to dual shifter mounts to fit both the B and E bodies: up: scope:

Thanks for the info , wasn't sure if it was still a thing for 70. What about 383-2 bbl , did they carry over to 1970?

With this in mind it's from a 70 Roadrunner, or lower models that were available with a 383 .