by Monza Harry » Fri Apr 18, 2014 5:15 pm
Not too many Stock HEI's will go past 5500/6000 when in perfect shape, if this is a little less than that, it could definitely be a major contributor to the problem. Check the condenser, coil, module, and cap/wires, you are near the end of its design threshold. There are lots of upgrades available for that excellent ignition system, there is a reason for so many still in use today! You could have break down due to degraded parts, or cross fire, etc. They are also known for a bleed through condition right through the adv. mechanism and shaft, check all that ass'y out as well. Just some of my experience. I hope this (or something easier or cheaper helps) You will get many good ideas to check out. Harry
I'm not a hoarder I'm a preservationist 78 Monza Spyder (~Soon(ish +/- I guess) To Be 2+2 with Spoilers)