The 454 currently in my '79 C30 ramp truck is getting to be tired and smokes pretty badly. Originally my plan was to find a truck with a fresher 454 and do a swap. However, the thought has been kicking around in my head about swapping in a diesel. My main thought here is for fuel mileage as it will be hauling my drag car and the track is about 100 miles round-trip. I will also haul a project car/truck from time to time but don't anticipate hauling more than 4k-5k on the back of it. I do not know much about diesel but I am mechanically inclined and would like to learn. I've seen Cummins swaps and like the idea but I unfortunately do not have the proper shop set-up to do much of any fabrication so that is probably out. It looks like a 6.2 is the only real 'bolt-in' option. Would it be worth my while? And is it truly 'bolt-in'? My plan will be to get an entire truck so I have all the little odds and ends available. Are there any other 'bolt-in' (or close to it) options?