7 1/4 rear work with 318?

My wife's '72 V8 Scamp came with one from the factory. I also have one in my '72 Duster with a 318 and 4 speed. I have been known on occasion to bang a gear or two and it is still fine. I have an 8 3/4 to put in eventually but for right now I'm gonna stay with the 7 1/4.

Chuck