I was going through my storage shelf when I came across an older HEI distributor that I am not familiar with. It uses the same cap and rotor as the mid 70s-early 80s one wire hook up for chevy small blocks as well as big blocks but has 4 extra wires that comes out of the housing. The ignition module also has 5 terminals instead of the 4 terminal style that I'm familiar with. I'm trying to find out what year this small block distributor is from so I can look up the wiring diagram and do a bench test on it to see if it works. The 4 extra wires are blk/brown/white/green. Any responses is greatly appreciated.

 

That's one of the computer controlled HEI's from the 80's. It has the same chassis so You can install the older parts and it'll work.

 

Thanks Uncle Bill, I took a closer look and found it like you said. I'll dig around for an older style ignition module and convert it to fit my 80 Pick up.

 

i have built a mild 350 for my 84 caprice classic wagom and i am pretty good with wireing i am eliminating all emitions and other useless stuff under the hood including wires need to kno what the extra dist wires are for