What to use for ignition high HP engine???

[STREETRACE69]

I have been on here off and on. I am building a 69 Camaro with a day 2 type theme. I am trying to use mostly period correct for early 70's build. I had a NOS early style MSD that was even sealed in the box. When I hooked it up the moment I put power you actually heard a click type noise in it. I had read in Hot Rod? that they could swap the internals with a newer box. I shipped it off and they said it is not repairable and can't swap new into old box.

Engine is a 11:1 427 with approx 500 or so HP. In fully loaded street car it ran mid 12's with a HEI. I amnow running point triggered Accel distributor with old Accel super stock coil and yellow wires. It actually runs great as is but a little rich and a stumble here and there. I am not wasting anymore money on the vintage MSD deal. I have never really seen a difference with an MSD.

What is period correct? Anybody else running points and no box on a HP engine??? The points were kept as they were only trigger for MSD. DUI HEI would be quick fix but I would loose all my other parts. Any old tricks or ideas for something that works and isn't just good marketing.

Sorry for long post and this day 2 stuff is getting expensive.