i posted stuff before about misfiring after 4500 and up rpm....i gapped my plugs to .35, and to .30, i tried different ones, my car still misfires when i floor it...im on a tight budget, the msd igntion is kinda expensive, and the new spark plug wires and ngk spark plugs, is kinda cheaper...to fix this problem, what should i go for? what do i do?

if possible switch your plugs and wires out with another 420A just to see if it fixes your problem.....an ignition system would BYPASS the problem not fix it, find the actual problem and fix it.......