so one of my spark plugs are stuck and my car is running like crap, i took one of the spark plugs wires off and noticed the sound didnt change so instead of risking getting the plug snapped off or stripped im goin to put my 97 ls head on that i have lying around, i got it cleaned pressure tested and milled, and i might get it pnp w/ 3 angle vj before i put it on (maybe). I was wondering once i have the head off is there anything i should do like get a new water pump, oil pump, i want to go with gsr pumps but do i also need a gsr T-belt and i might put on my ctr n-1 crank pulley too? will any of this change the timing? or will it be fine?