im in need of some help

when i start this motor,360 ,it runs pretty ruff.it has a 1405 and no choke..iv tryed 2 dizzys 2 coils two ecus...plugs were pretty dark so i matched jetting with the 1406..it has no miles,alignment issues.....,only a few hours of break in and garage time...when its first started it runs ruff till it gets hot ,then it runs fair..but it never runs clean.. off idle 1200 TO 15 hundred or so it stumbles ever so slight and misses a little.the miss is never constant [like a wire or plug]it varies and iv put in new plugs.wires and cap and rotor are good 75 to 105 ohms no breaks new taylors...fuel pressure is 5 pnds and i did a hot compression test at 155 plus or minus less than 5 lbs variation on all cylinders..iv tryed 12 volts direct from the batt to the + side of coil..no change.resistor is .6 ohms and 6.0 ohms.....im beginning to think iv missed on the intake gaskets...any great ways to tell if they are sucking air i havnt used any chemtool or propane around yet..if i cup the carb i can stall the motor..i havnt looked at manifold vacume yet either..any help PLEASE..TX..J