Folks, I have a 1987 HJ60 and I love It. The 2H engine runs well. But, two things have arisen. One, it leaks oil so much and all mechanics in my area say there is not much I can do about it. The driveway and garage staining has become too much. As well, I really want something that has some pickup because I do a lot of in town driving and it lags too much leaving a stop. What are my options? Is there a known shop that will swap out the engine for a diesel with some more force? I am happy to have the truck shipped to a location within the 48 states. God forbid, is there a swap out to a gasoline option? I am willing to entertain even the more expensive options as I want this to be my regular, daily ride for many years to come. Thanks!