Ok, so im thinking about swapping a Duramax in my '78 maybe next summer. I would like to know what you guys think about it. I know most of the stuff ill need to do like the hydro boost, boxing the frame, deal with fitting the tranny, throttle, stiffer springs, gas tank/lines, ect. I havent thought of ALL the small things yet. I talked to the GM STC teacher and he said a guy swapped one into an H1 and it was close to 100k hours. I understand that the truck doenst have much electronics to deal with to start off, so thats a plus! So basically, what so you all think? Input is always apperciated.