This is for an '83 full size Blazer originally equiped with a 305 engine and now has a pretty new 350 Chevy universal crate motor. 700r4, NP208, 10 bolt corporate, 3.73:1 gears. Edelbrock 1904 qjet, no thottle position sensor. Computor under the dash, knock sensor on the side of the engine. The old distributor is perhaps an EST HEI although there is no EST module on the firewall. It has a vacuum advance, 5 spade ignition module inside under the rotor along with a condensor or capacitor, 4 wires (black, white, green, brown) going to the weather pack connector and then going through the firewall to the computer under the dash. The old distributor has over 300K miles on it and the advance weights are getting a little sloppy. I need advice on what distributor to buy and how I will hook it up since it probably won't have as many wires (4) to go to that weather pack connector. I bet they have only 2 or 3 wires to go to the computer right? So that's where I get confused. I don't need a real fancy expensive one just a good decent one. The Cardones seem to be the cheapest. Are they OK or is it worth getting something else?