I don't know how major a project you want to make out of this car. Being a fairly heavy car, I'd go with a 460/aod combo,even if I had to cut away all the front suspension and shock towers,reinforce the framerails with 2x4 steel and add a mustang stlye suspension with airride. You'll probably take a couple hundred lbs off the front end too. I'm not giong to say you could do it for less than 3 grand though. Hank