At one time i would have been alover a V8 of anykind. But now a days i see so many V8 varitions its all boring. So this might be off the wall but have you ever considred the Slant 6 that came in it. There is place called clifford 6=8 that specialzies in the inlines and there uniqe. Or one of the new motors out today would be cool. I think the SRT-4 motor is availbe in crate form. That would be cool and uniqe. a turbo charged fule injected 250 HP motor in a old dart.

Im nuts this is the kind of stuff i would do. I just want be diffrent form the other guys, i mean i go to car shows all the time and sometimes i think if i see one more 350 TPI with a 700R4 tranny and IRS or 9 inch rear end i am going to puke.