The air bleeds on the carb are towards the top. Gaskets have nothing to do with them. Stick a fine wire in each one to be sure they are not clog.
The problem with guessing is you think whats been changed can not be it. My 1 month old MSD plug wire touch the header and was miss firing only @ wide open throttle and only after 15-20 mins or more time. Turn motor off, 20 mins later ran fine till it was very warm.
Well I had a MSD 7 box, so dumb me thought the box could be going because my battery went dead a week before and I needed to jump start it. MSD tech told me that can damage the box, send the box to them.
Put my old MSD 6 box back on. Motors running great now, all the time. Even drove it for 1 hour straight.
2 weeks later my MSD 7 box comes back-no problems found!
Put box back on and the motors misfiring again! Called MSD saying thats its bad and was not fix. MSD told me no way, it was tested for 4 hours.
Well that did it. Only thing it could be is my 1 month old wires-I changed the cap, rotor, pick up coil because they were old.
Yep, I got my omh meter checking each wire and then I see a crack in the spark plug boot. Put a different wire on, problem solved.
What happen me and MSD thinks, is the 6 box was not strong enough to find the ground but the 7 box was.
I wasted time, money and felt like a fool yelling on MSD tech line. They did send me 2 brand new wires for free.