Misfire issue

I’m new here I try to just search online and stay off of forums however I haven’t found a fix so here I am.

so to make a long story short I have a 98 2.7l 3rz I tore all they way down new rings, bearings, rebuilt head (all new valves) ch Initially had a misfire on cyl #1 found a burnt exhaust valve. Installed new motor and have been fighting 1 issue after another it is currently throwing a P0301 code for misfire cyl #1 compression on 1-4 is 125#’s new maf sensor, o2, Af, new injectors, fuel filter checked fuel pressure from fuel pump all looks good. Found #4 injector was not working so replaced with an old injector. However it’s still throwing a p0301 any ideas I’m planning on replacing the # 1 injector tomorrow with an old one to see what it does. It also has new coils, wires, plugs within the last 5 miles (need a daily driver!!!!)