Nope thats not the issue I assure you. Did it with two sets of good plugs, two sets of wires, two caps and two rotors.
It’s something that has to do with ignition just none of those.
Furthermore if you re-read OP it states when cranking prior to engine starting it has good spark with SPOUT in but, once it starts it’s very faint to non existent. So, that in itself shows what I am saying.
Possibly coil now, TFI, or distributor.
If I get the time and not so tired from work I got a PM going on with a guy on this forum who wants me to do some tests that should help narrow it down.