Like I said, this is our first attempt at anything like this. Yes, the rear end is a mod for sure. Originally it came with a 411 rear end, but it has been changed to a 97 Jeep Cherokee (355), which fit perfectly & we can go over 40 MPH . We were totally against changing the engine, until the water distribution tube broke, and began to run out of time. We've got a 318 in it now. Here's a few pictures. I'm working on a video which I will share when it's finished. Don't be too critical, she was saved from a barn & was built on a budget. I took lots of pictures along the way - Lots of POR, sand paper & time!