1966 valiant Post engine swap?

I am looking at a 66 post valiant with a /6 auto. I want to put in a 72 360 and 3 spd. on floor(70's style a body).

I already have pedals out of a 65 dart( /6 3spd)

column out of 66 cuda

what do I have to do to get the engine and trans in?

Can i just use 273 mounts and shim the one side with stock K-frame?

Any help would be great!

Thanks