Now there's a new problem
 

So I did multimeter testing, tested the electronic components and the CMH, changed a solenoid, electronically everything tests up as good. When I drive it'll go for a while, then die. I'll restart, it'll run for a bit, then die. And it'll keep doing this an infinite number of times. It's an 87 pickup with 22R.

Have you ruled out, fuel pressure, fuel filter(trash in line), vapor lock(fuel line expose to high heat)?

I have

Define a while 10' 50' 100 yards 250 yards

Does it stop like you threw a switch ??

Rpm just keeps dropping till it quits ??

Still part of the same problem your just working through and fixing things as you find them

About 250 yards. The time it runs gets shorter and shorter as I keep restarting it.

On a 22r, I would go with a Webber Carb and go thru my fuel system starting at the tank all the way to the fuel pump. Just not much to go wrong on a 22r. How is your Coil? There are test that you can run on it. I dont know how long you have had the truck, but have you done a complete tune up on it? I was helping a guy a while back and what seemed like a major issue was a consumable part, tune up parts, and was the issue. For myself, I do not trouble shoot a motor until a complete tune up has been done or I know the parts are in great condition.

Oh I forgot to say, yes the RPMs slowly drop until it dies. Weber is a good idea, but it doesn't suit my needs as the Aisin does. The entire fuel system has been gone thru, all changeable parts changed and all other parts cleaned. (And fuel gauge sensor fixed) The only thing left is the carb.