I've been considering an Isuzu diesel engine as an option for a while. It was between a Caddy 500, Olds 455, Cummins 4BT/6BT or an Isuzu plant. I first decided to start with the Olds 455 since I had most of the parts handy already from a past Cutlass project. However, I just recieved a call tonight from a guy I work with. He said he has a buddy that's got an Isuzu truck on his farm that's being parted out. As far as he knew, it's a 6cyl turbocharged engine with 280k miles on it. He said It can be started up and heard run. To be brief, I can pick it up for less than the machine work to prep my 455 for install. I can pretty much pull whatever else I want for the motor when I pull it, including the transmission. So, I figure I can get a diesel (which I really want), an overdrive transmission (again, something I'd like to have) and save money. For all the gurus out there... What should I look for on this engine? Anything I should keep an eye out for? Is the tranny any good and will it hold up to offroad abuse? I'm going to move then engine back on the frame to move some of the weight off the front end. The batteries, radiator and anything else I can move will be over the rear axle. It's going to be a K5 frame w/ a Mazda pickup cab and clip on it w/ a custom flatbed.