Ok so i found out that I got di*ked over and the engine in my Plymouth isnt matching to the car, so Im switching out the engine for a Hemi. Are the motor mounts different? or did all mopar share the same mounts?

Anyone have an idea of what would be a good hemi to place in it? I was possibly thinking of a 291 or 331. I wasnt thinking of going much larger.

Any advice would be much appreiciated!!