cant get rid of the miss

alright lets see how good i can descibe this

theres a loud put coming from the #4 cylinder
i took the valve cover off and started the engine and tightend the rocker arm and the miss stoped for a couple seconds then i would have to tighten it again cause it would start back up

so i think its a collapsed hydraulic lifter i replace both of them for that cylinder and both the pushrods too. still the miss

so i take the rollers from the #1 cylinder and put them on #4 to see if they are worn and still the miss on 4

then i move on to ignition, i get new plugs...still missing
i check to see if i have a crossfire going on and no.

now when i take the plug wire off of the distributor for the #4 , you can hear something still isnt right but the loud putting stops and almost sound normal....

any help guys? this has got me and pops scratchin our heads

passed the strait edge test and the nut isnt backing of either

i forgot to add something, there was either oil or gas on the spak plug threads, it was black but smelled of gas

dammit

all i wanna do i get it runnin cause its been broke for about a month now