Engine options to put in 67 Dart GT convertible

Ok, I'll be the odd one out. There's nothing wrong with a 440 (did that in my son's '67 Dart convertible when he was in high school (he's 29 now). I'm putting a 440 in my '67 Barracuda convertible.

With that said, FIRST suspension and brakes. What you do will cost a fair amount, so plan ahead.