My painless wiring harness manual is labeled 90625, for harness number 10104, 21 circuit.

The truck is being converted to a GM 12 volt alternator with a electronic ignition distributor from a 1983 S-10 with a 2.8 V-6.

Attached are the pictures and pages from the Painless manual that applies to these questions. I assume no ballast resistor is needed as this will be a 12 volt system. I do NOT have a tachometer.

I will send another with my 6th attachment.
Attachments
Ballast resistor.pdf (563.48 KB, 7 downloads)
Coil.pdf (724.19 KB, 8 downloads)
Engine scematic.pdf (301.85 KB, 7 downloads)
Engine section.pdf (700.04 KB, 6 downloads)
Ignition switch.pdf (366.07 KB, 8 downloads)

400case
1951 Ward LaFrance T120
1946 Chevy 2 ton
1936 International C35
1923 Sayers and Scovill