what are the chances of puting in a chevrolet hydra-matic- much change/modifaction involved? Has that been done? the 40 has a 54 motor a 235 with hdy lifters enough power for these Maine back roads 50 mph or so. I like the 6 lug artillery wheels don't want to change that don't need a lot of top end speed. Just a bit faster off the line. Any tips hints ? thanks Bill