I took the cab off my 1954 Chevrolet pickup with my engine hoist, I didn't know you couldn't do it so I did it anyway. The result was I removed the 3 window cab and put on the 5 window cab with no problem at all. I am getting ready to take the cab off of my 1932 Chevrolet pickup to box the frame for a much stronger engine than it was made for, and I expect no problem with that either. Next project will be to remove the body from my 1932 Chevrolet 2 door sedan so I can box that frame also, I guess it will take some careful measuring to balance it but I am confident it will work O.K.