i bought 1990 thinking i would swap in diesel down the road but have changed my mind a bit. my thoughts are that 3.0 is a pretty good motor as it seems to power the truck just fine and the gas milage isn't to bad, there are also parts available all over so if you break down i'm sure you could walk into any auto parts store and get parts and if not you could order them and have them pretty quick. cost wise just getting another 3.0 would be a lot cheaper as you already have the transmission, fuel pump, exhaust, and wiring harness in place. i had the same dream but the idea of having an engine that is not very well supported in the u.s. just doesn't make sense. buy a 3.0 used or have yours rebuilt and drive it for 100,000 plus miles.