I Need Help!

I purchased an low mile 1983 dodge diplomat and took out the 318. I also purchased a 4 speed out of a 1972 dodge challenger. i want to put the 4 speed behind the 318.( I SCRAPPED THE DIPLOMAT/ I AM PUTTING THE MOTOR/TRANS IN MY 38 HOT ROD)

So with that being said, will the crank need drilled out or will the 4 speed fit? i know 1983 had dodge trucks with manual transmissions, but unsure if the 1983 diplomat will have a drilled crank.

Someone mentioned that if it does fit the crank needs to be rebalanced for the fly wheel or it will not hold.

I hope not the whole purpose of the motor was to not rip it apart it is a low mile motor. please any help will be very appreciated.