my guess is when they left the world of carberators and went totally fuel injection,about 1994.
HEI was an ignition system used on Chevrolet and GM vehicles.
1975 model year.
the firing order on a GM HEI is 1-8-4-3-6-5-7-2
That was probably 1975, when they introduced HEI.
No, the coil is in the cap on a HEI distributor also there will be 6 pickup elements instead of 8
HEI 0.45 HEI~ High Energy Ignition/NO POINTS Large Dist. Cap No external coil Non-HEI .035
If you are running the stock HEI distributor, .045" is good.
I believe 1993 models used R-134A
Year? engine size?
i have a gm goodwrench 350 with a summit hei distributor in my 58 Chevy truckits about 1/2 inch from my firewallso... little room to spare but yes it worked