Engine build up options

My 69 cuda has a 318 in it. It came with a 383 when i bought it but i dont think i wanna go big block. i have a 360 out of a van that i was thinking of putting into my cuda. The 360 i presume is going to have to have a complete rebuild, the 318 runs as of now also. I would like to know what do you guys think i should build(i know most of you guys will say 383 haha) but id like to stay small block maybe. Should i build up the 318 or 360 or swap cranks out of the 360 into the 318(what does that make for size?) Im really at a lost here, and i need to redue my wiring under my dash before anything but just in the future. Id like for my car to run low 12's to 11's . I might keep it auto unless i can find a 4speed and pedels around here for a good price. And i dont think i wanna tube it out...yet :thumblef: Id like for it to be a driver and not get horrible gas milage maybe 10mpg haha You guys got any suggestions or things that you have done to get your car running good/fast. O and i have a /6 rear (7 1/4) which i need to swap soon.