Engine, Trans., and Rear Help

Hey Guys I need a little help!
I have a 67 Barracuda I did a frame up resto that will be done next week.
I am not a big gear head, but I like power and speed. The car will be mostly a street car back and forth to work and hit the local cruz night.
I am thinking of a 340 or a 360.

Do you guys have any good suggestions on the engine trans and rear?

Thanks