Mild 318 misses at 3000rpm

to check rotor phasing: drill a 1/2" hole in the dist cap top flat area 2/3 of the way from the center cap terminal to the #1 cap terminal & shine your timing light down in the hole to "freeze" the rotor position like a strobe light does on a dance floor. You want it close to dead on with the #1 terminal & try it with the can disconnected/plugged & idling and with the can connected on a fast idle so you are up on manifold. Only vac adv, not mechanical adv or idle speed changes RP. Ideally you want it a bit on the CW (trailing) edge of the cap terminal as RP will shift it back CCW on a SB. The hole will help let out ionized air molecules in the cap (as said helps prevent crossfire) or for aesthetics if desired drill a hole in a junk or spare cap instead. to fix it; redrill another hole for the roll pin in the reluctor. drill a bit inward from the center ID hole then break it out to the ID with a minirat tail file, duplicating the OE roll pin holes. Do carefull measureing & if off there is plenty or room to drill another one. also a good idea to drill out the rotor blade rivet & add a longer piece so there is .015" from rotor tip to cap terminal as this radial clearance distance adds into the RP (circumferential arc) distance & if the required voltage needed for the combined gap is greater than what the available voltage can jump then it will misfire