Can't decide on how to go.....help

Ok, guys, here's my dilema - I have a 68 Barracuda notch that I'm doing for primarily the street, but will also see the strip occasionally. Right now, I can't decide whether I should go with my fresh small block and automatic, which the car was originally, or I have a complete, minus trans hump, 4-speed setup for the small block. I also have access to a complete (needing rebuilding) '70 440 (but no trans). So, help me move off-center. Which way would you go? The 440 is awfully tempting, but much more costly, initially (although I think I'd make my money back if I ever sold the car:scratch:). The small block is ready to go and converting it to a 4-speed isn't really a big deal. I'm stuck!:scratch: