Have a possible opportunity to pick up a good k30 with a new 454 and TH400/205, its an 84. I thought about swapping these components over to my current truck, as well as the D60, but it would be easier to just go with the K30, a whole lot less swapping. The only thing I'm concerned with is weight. I read somewhere that K30 frames weigh like 1000 pounds more than a 1/2 or 3/4 ton frame. Since my truck is basically a daily driver/trail/sand dune runner, it seems that the weight difference would be a big drawback, both on wheeling ability and gas mileage...which would make it better to swap the strong drivetrain parts onto my "lighter" frame...any thoughts on this? And I know 454 "gas mileage" might sound funny to some, but I think a strong running 454 in a lighter truck should be capable of 8-10 MPG, which is all right with me. Current truck: 86 long bed half ton with 3/4 ton axles, 3.73 gears and 33's. In the next few months, it will be re-geared to 4.56, lifted a few more inches and 37's put on it, 305 will be replaced with a GM 330HO if I don't get the big-block K30. Edit: Thanks for the replys! I must have read that K30's are about 1000 pounds heavier total, not just the frame.