tune up help

It was not missing to my knowledge but always had a hesitation off idle (that has never gone away even before the 71 carb/intake/exhaust manifold swap)and should also mention that it has no smog stuff (except the charcoal canister which is hooked up) AND most importantly it has a rebuilt Holley 1bbl off my 71 Demon..

it ran all last week and parked it for the weekend (didn't start it all weekend) did the tune up this morning and now it misses badly

intake/exhaust gasket was done 20k ago and is still good
should be no vacuum leaks
I will check the valves under the cover tomorrow
the timing gears and chain were done 20k ago also
timing is dead on 12-16*


I used Autolite copper (PN 26) gaped to .032" non gasket type plugs

the truck was not moved during the change nor is the firing order wrong, this has a smog head if you're referring to the spark plug tubes- it doesn't have them all metal surrounding the plugs

the cap is a Wells brand and was replaced by the same brand- it needed it but I will switch them out tomorrow before the compression test (it's first tune up in 50,000 miles (besides oil changes)