Need help tuning Quickfuel carb

if it still ends up missing at 2500rpm, which is when the main curcuit in your carb comes in, but also when your mech advance and vacuum advance are all working too...you should try driving it with the vacuum advance disconnected.
if that fixes your miss, then you need to look at rotating the reluctor in the dist. i've never looked at a firecore dist. so i'm not sure if it's the same as a factory design...