Hi, I new to this here site. I have just got an old 70's 521 pick up given to me from my paps, he built it years ago converted it to a four wheel drive with all jeep running with a L 20 powerplant. It has been sitting for some time now and he says that the hei that is in has done craped out. So I am doing some resaerch to figure out where I can get new one or maybe a diagram of the corret wiring procedure for it. He says they have kits for it but cant remember the site he had seen them. So if any one here has any clue wich Im sure some one dose out their some tips or info would be great. Thanks alot and glad to part of the old school dastun community. Cant wait to get her on the road before this winter to do some good snow wheeling in her. My dad say it has a weber carb cam on her and header and exaust that will break glass when wrapping the pipes.