Engine Build Ideas...PLEASE HELP.

I personally think 340's are cool, and if the car is numbers matching I would just rebuild whats in it. If its not, build the 340 and put it in the demon, and put a 360 in the dart sport. Either way, I dont think the 350 HP barrier is all that difficult to get to. You gotta think, thats just over 1 HP per cube for a 340.