Need help tuning Quickfuel carb

So during my lunch break I took my timing light out and put it on each wire and brought the rpm’s up to around 3k and I couldn’t see missfire in the strobe light on any cylinder.
But when I drive it I can tell it’s stilk missing around 55 mph in 3rd gear which is turning about 2500-2600 rpm.
Before I removed the wires and cleaned the dielectric grease off the plug wire connectors it would start missing at about 45mph.
Now it’s changed and doesn’t start till around 55.
So messing the wires did something and it’s making me think these wires are junk.
Before I order a 125 dollar pair of firecore wires I’m thinking on my way home I’ll stop by napa and grab a 25 dollar pair of their premium Belden wires and put them on.
If it stops missing then I’ll order the firecore wires.
If it continues then I’ll know it’s not the wires, but I’m also going to pull each plug and make sure none of them are fouled prior to putting the new Belden wires on.
This issue certainly feels like ignition when your driving it, like a sharp sudden missfire that comes in and out in and out and shakes the whole truck I can feel it everywhere in the seat, and in the floor boards.
It’s super annoying and I’m thinking since messing with these wires has made a little difference then I’m hopeful that’s what this issue is.