I love 'em! I put a MSD billet distibutor in my FMS 392W after the duraspark exploded at the Fling last year.
I run 20 BTDC degrees initial and 32 max.....all in by 3000rpm. No Vacuum. To limit the mech advance to 12 degrees, I machined my own spacer/stop bushing. It measures .400" OD. I have a roller cam....so I had to buy a different gear with the distributor.
My MSD-6AL rev limit is set @ 6000...and I had to buy a card of chips.
...I am very happy with it all
