Originally Posted by 72rocket
I have a '72 350 with an add on HEI. I had the plug wires removed (and marked) and misplaced them over the summer. I had to buy new wires and need to know where the wires go on the distributor cap. I know the firing order on the engine but do not know where to put the wires on the cap. The electrical block on the HEI is pointed towards the driver's side fender. Any help would be much appreciated.
start directly behind the coil pack on the dist cap. Looking from the front of the car to the back the #8 plug is at the very back left (same side as the voltage regulator), the next one to it's left is #4 then #3 etc. That gives you the right order and the directional turn you need to fire properly. (Olds distributor turns to the left). When you're done, #1 is just to the right side of where you started #8. I drew a picture on the computer to show you what I mean. It's attached to this thread.
One more thing, now that you have an HEI distributor, a standard air cleaner won't fit. You'll have to adapt yours, or get one with clearance for the HEI cap.