66 d100 dodge my son is considering, your thoughts

Maybe because I would not be interested, I think it's too much money

"1 ton suspension" ?? You sure? Frankly I doubt it. If I DID want a big old pickup, that would depend entirely on the use. If I was gonna haul wood, junk, and pull trailers, then a D2-300 might be inviting. But if I wanted a "hot rod" pickup, a D1 would be what I'd want.