Driveshaft Problems after Engine Swap!!! Help???

I swapped out my 225 slant 6 engine out of a 1974 plymouth duster and dropped in a .30 over 318. I bought a 904 transmission and had it rebuilt, and after i bolted the transmission up, my driveshaft seems to be about 2 inches too long. I crammed it up there, but there is no play and it just doesn't seem right. I am not quite sure what to do. Anybody have any ideas on what is wrong? Hopefully I can get some answers. Might just have to take it down to the machine shop and have it shortened and balanced? Thanks for your time guys.
Author: klayton9