1974 dart 2 door 318/904/8 1/4?drive shaft length

Im picking up a 74 dart 2 door with 318/904 and I believe 8 1/4 rear it doesn't have drive line I've only seen pics of car I live next to wrecking yard,there are no darts or a bodies there but lots of 80s Dodge cars is there any certain cars that may have the Drive line I need?or at least a good candidate to have shortned.i m on a budget.i may go c car today I believe it doesn't have slip yoke so what am I measuring?center of amount to the end of trans but how far in are splines that yoke slips in.sorry if I sound dumb haha I've never got a car without driveshaft this will be a first