V10 Dodge Dart Demon or Sport

well lets hear about it ?? i may research used VIPER MOTORS,, see how it may fit in my 66..that would be killer,,

Not much to be said about it. If it fits under your hood, it's no more difficult than installing a Gen 3 Hemi. Get the computer flashed, send the wire harness to hot wire for them to build a custom harness, build headers, motor mounts, and fuel system. Chrysler even produced a book to give all the specs, measurements, tips and parts to make it easy. Size matters in this case because most will need to cut the firewall and possibly move a radiator into the core. The engine is LONG! Just cuz a slant fits doesn't mean the V10 will. It's also HEAVY! I don't know how heavy an iron big block is, but the V10 is around 620-650 pounds, depending on which resource you're looking at.