Tell you what, if I got my hands on a V10 Dodge engine for a killer deal, I'd adapt it to work in my truck!!!
Actually, another good idea which is very feasible (unlike the V10 idea) would be a Buick, Olds, or Pontiac 455. It doesn't take much to get 600 lb-ft on pump gas out of those engines. Great truck engines...too bad they never put them in trucks.