Quote:
Originally Posted by Boog
I have long thought all GM's had HEI ignition since 1974 until now.
When looking up ignition modules at O'Reillys and Rock Auto there are GM genuine HEI and W/O HEI ignition modules available. The images and info are the same so what gives?
Also an AC Delco module listed for my 91 looks nothing like the others.
Who is GM genuine if not AC Delco?
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If your distributor had the coil on top of the cap, it would be HEI but since it does NOT, it's non-HEI. So obviously your coil is located elsewhere.
Your ICM would look like this
I'm not sure about yours, but most modules require heat sink compound
GM parts are made by AC delco and a few other names are sold as well from the same sources.
I would stay away from some sources of O2's. Bosch being one of them. My truck never worked with Bosch.