Ideas on 360 build

I was needing ideas on a good 360 build for my 1974 Dart Sport,thought about a 440 but I figured a small block would be so much simpler.I would love a 408 stroker kit but probably not happening on my budget for awhile.I'm looking to just have a good street car I can take to the track occasionally for fun.I'd like it to run mid to high 12s to a 13 second car that won't be so bad on gas that I could take it on an occasional 200 plus mile drive,so no 5 to 8 MPG,lol It has a warmed over 318 right now.It's got an auto tranny,8 1/4 rear(unsure of the gear ratio but I'm probably going to swap over to a 8 3/4 rear since I have 2 here anyway) I'm fairly new to Mopars (also have a 1973 Satellite) so any help would be appreciated.