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.
Yes, absolutely
I believe 1993 models used R-134A
Yes, absolutely
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