Tuning with jets, Power valves and an O2 guage

Frankenduster said
Yes...I have taken the distributor as far as it can go with the Mallory springs. To slow the advance any more, I'll need some bigger springs.

The slowest curve it can make is still all in before 3k? The MSD I used to run could be curved from 1800-4500 all in, are you sure that's as slow as it can go with the parts?

so get some bigger springs or make the weights lighter.

If you can't make it slower than 3k, then this is likely your best option for a slowed curve...

But since you've already decided to open up the chambers by putting in 0.075" gaskets, maybe it'll help...good luck.