The Summit Billet distributor uses the same trigger setup as factory Mopar electronic distributors; it looks exactly the same under the cap. Where it differs is in the mechanical advance, it uses weights and springs supposedly adapted from the old Mallory units; much easier to adjust than the Chrysler stuff although according to
@Mattax doesn't provide as linear/consistent advance with RPM. From what I've seen online it's also the same as the Firecore distributors.
I drove the truck to work today and it seems better but still not as good as it should be. Idk if I'm expecting too much but I feel like at idle with a stock cam it should be smooth enough to 'balance a quarter on the air cleaner'. I also filled it up with gas and this past tank only got 8.5 MPG, the horrible gas mileage is another reason I've been making myself crazy trying to get the tune just right. I've already gone through the carb and know that's good (tuned Edelbrock AVS2). I suppose at some point I'll try switching the pickup wires around and go from there. I do know I need to slow down the mech advance, it's all in by about 2000-2200 RPM which is way too quick, should be more like 3000-3200 RPM.