HEI conversion benefits
Yes id buy a mid price one where the manufacturer is happy to put their name on the box
or preferably on the module
wells neidorff borgwarner delco Napa Echlin etc
i would not buy a HIGH POWER version from any of the ignition specialists. there isn't really a lot they can do to make it any better than any other apart from some blue printing to their own specific coil.
i chunter on a bit about HEI here
FBO's black HEI ignition box
this is what i put in the ebay search box when looking for a module in the US
(ac delco,wells,petronix,car quest,napa, niehoff,borg warner,gm,mallory,jegs,moroso) (dm 1906,d1906,acc35361,acc35367,d2000,21040,ech tp45, dr400 ,cbe4,cbe22,10482820,607,555-40600,97857) (module,hei)
But i currently have one off a peugeot or fiat
hella 5da006623051
and a run this 1976 chevy truck coil
1976 CHEVROLET C20 PICKUP 4.8L 292cid L6 Ignition Coil | RockAuto
of look for
Standard Motor Products DR35 Ignition Coil
i have more money in a distributor recurve than i do in module and coil...
I also run a diode to protect my meagre investment
more about that here
New release Distributor for Slant 6
the diode + postage cost more than the coil :)
I added horrible document in my post earlier this is an easier read and you can download it
its by the same Dr Holden but its a bit more real world rather than science paper
CAPACITIVE DISCHARGE IGNITION and MAGNETIC DISCHARGE IGNITION: - PDF Free Download
Dave