HEI cap has coil mounted in it. they do make a blaster coil that fits in the cap. if your coil is the type of blaster that is shaped like a soda can but a bit smaller it WILL NOT work on an HEI
If it is a early model HEI. Then the inginition coil is bolted into the top of the distributor cap.
An HEI distributor has the coil mounted in the distributor....not separately. Simple way, count the wires coming out of the cap. 8....you have HEI. 9 you have a point set up.
Any '74-'80 Chevy HEI distributor will work. The biggest thing you have to do to add HEI is to run a larger positive lead to the coil. The small gauge wire running to your stock coil isn't large enough to carry the proper amount of voltage for the HEI coil.
Question is confusing. Original wiring, power to the plus side of the coil, minus side of coil to the distributor. If you have put an electronic HEI distributor in then eliminate the coil and take the plus side wire and connect to the HEI.
Stick with the coil recommended by Mallory.
HEI? inside the distributor cap
an hei has a solid state ignition module rather than mechanical points... the hei is capable of much higher coil voltages because there are no points to wear out.....the hei is better in terms of performance and longevity
If it has an HEI distributor (big cap), the coil is on the cap.
The green wire from the tach goes to the negative side of the coil.
No, the coil is in the cap on a HEI distributor also there will be 6 pickup elements instead of 8
On a high energy ignition, possible problems include: Faulty keyswitch, faulty wiring or connectors, faulty pickup inside the distributor, faulty electrical condenser, if it has points (depends on the type of HEI) the points could be bad, faulty coil or faulty HEI control module. You will need to identify which component has failed.
Connect the green wire to the negative side of the coil.