Wrenchbender, I have a 62 now that I am going to sell for parts (no engine). I am in the market for a solid 64-66 shortbed to restore so I can't answer your question. I posed the question because I may be able to put my hands on a strong running 250 with powerglide out of a 72 ventura. 15 mpg does not sound like much for a six cylinder. I want to put a 283, 292, or 250 in the truck with an automatic transmission but I also want something that will give me decent gas mileage. What engine and rearend gears would you recomend? I do have someone that has offered me what he says is a good running 283 with a powerglide for $500. I believe he said the engine and trans came out a 67 or 68 malibu. I appreciate your response!