Dang, that means my numbers don't match. No, I haven't owned the truck for nearly 30 years as I am only 18. I have owned it for 1.5 years. I bought it for 850 from the Jewish Charity Auction/Wrecking yard. I guess its good that the engine was originally built for a 3/4 or 1 ton because that means it should have the good stuff inside like a forged crank and the beefier rods. I think it may be the high nickle casting, but I haven't had any reason to pull the timing gears yet. As for the PowerPak, it is the company that rebuilt it. They rivited a tag on the side of the engine near the oil filter saying: Rebuilt PowerPak Stock number... I just wanted to know if anybody has heard anything about that company.