Ran into a new problem on my 91

[91z71]

My 91 k1500 with a 350 and 5 speed has a new problem that I can't track down... It has started doing it pretty regularly now, and I can recreate it every time now. It seems to just suddenly miss when in too high of a gear. When I'm doing like 20mph, if I put it in 4th gear and give it gas, it'll have a sudden hard miss fire and almost cut out, but then it is fine. It'll do this every time without fail.

I thought the first thing I would check was obvious things, like spark, air and fuel. Air filter was clean, as I had just cleaned and oiled it a week ago. I pulled the cap and rotor, inspected that for cracks as well as the dizzy for play (none). Then, all the separators for the spark plug wires are broken and they're touching each other, not to mention the wires are all different sizes and look like a rats nest. Wires looked fine under a visual inspection, I'm gonna pick up some separators and clean up the wires and see if the issue goes away.

Does anyone have any idea what wires go to what cylinder? I know the firing order and what cylinder goes to what point on the dizzy. But, like I said the wires are different lengths and I don't know how they're routed or what wire goes to what cylinder since it isn't marked on the wire.