consider: how do I make a machine this heavy stop form 70 miles an hour when it was designed to stop for 45.

that would be the big changes, add that the suspension was also not designed for that speed.

am I saying don't do it, Nope. just that this is the area that you will end up spending money on to make your free driveline safe. as well as the other modes needed to fit the engine and driveline under the vehicle.

personally, I perfer stockish, unless there are safety reasons to make it more modern. but that is just me. there are plenty of people who prefer to go more modern routes.

-Mike R.