Aluminum block 3-53 Detroit 2 stroke engine. Has Chevy bell housing and SM 420 transmission included. Engine is army surplus from a Gama Goat. I was told it had approx 3000 miles on it. I started it up on the shop floor a few years ago and it ran great. Would make a great swap in a pickup. I have heard of people getting 25-30 mpg with these. Weighs approximately 700 lbs.