Low...slow... with alot of go is my vote.Airbag the suspension and throw some '20's on it!I've swapped bodies before from 2wheel frame to 4wheel using a 3ton engine hoist and blocks to seperate/transplant to a 4wheel frame.I did it in one weekend with hand tools-solo.But that was with a '73 fulltop blazer.I've also converted my brothers 4 wheel '72 blazer from 4 to 2 wheel by swapping front crossmembers,rearends and drive-trains.Take good measurements prior to ripping everything apart,take pictures with a disposeable camera for reference purposes,and go at it.Anythings possible with a sawsall,a torch and a little time- enjoy yourself.