do i need need a bigger carb

cant remember off the top of my head exactly what filter or how many micron, but its -8 all the way, its our winter at the moment, and i dunno what altitude our local is, but its not overly high like another one we race at, fuel pressure at the reg doesnt move, from memory arfs where low 13's at WOT, id like to see it in the high 12's. last couple of meets after pulling the pipes off and the motor requiring more fuel ive picked up 4mph, but after stepping up from 73's and 83's which is what i had it dyno'd with the pipes on. to 83's and 96's, i was thinking do i need a 950? i noticed also at around 6300-6400 is has a pop or a miss, it still wants to go but somethings holding up, ive been shifting at 6200rpm. plugs are a heat range of 7 and gapped at 35thou and a run a msd 6al 2 progamable with a blaster 3 coil, limiter set at 7000rpm, the next day after running we had the car on the highway and every now and then at crusing speeds (3400rpm) the motor would miss like you let of the gas for a split sec then went back to where u were. did it every 10km or so, fuel pressure was 7lb ive never had this issue before, around town with revs moving up and down all the time its ok, just sitting at consistant revs, im considering a new coil, maybe a hvc one ?