340ci vs 360ci engine

Do you have a car yet or are you still looking? If you are still looking and you want a fun driver with pleanty of inexpensive parts I'd get a 72-76 Duster. Don't worry to much about the motor back as a straight rust free body and decient interior slant 6 will save you more money in the long run. I had a great 73 318 disc brake gold duster w/o motor and tranny I bought for $350 just to get the disc brake setup off it. I stripped the rest and had to junk the shell because I couldn't give it away. (anybody need 73 Duster parts? LOL)

I looks like you might be leaning toward a late B-body Charger which is also a good choice but will cost much more then the Duster and ultimately be slower and handle worse then the lighter smaller duster. Then again Richard Petty said those late Chargers were his favorite race cars of all time and he knows a thing or two about cool cars!