I've been around these 8.2s in the boat business for many years, and I tend to shy away from them whenever possible. The 8.2 was the only 4-stroke diesel GM ever built. It was originally designed as a V-8 gas engine (502 cid), for Oldsmobile I believe. They're heavy, the injectors are hard to set, parts are scarce, and getting an 8.2 serviced can be difficult since few mechanics are famaliar with them. As a low-compression engine, they are inefficient and not very powerful. Horespower ranged from 175 to 300hp for the turbo version. Finally, many 8.2s smoke badly when started.