I recently bought an ‘89 iroc for a fun project car that I could throw my supercharged 350 into. I’m running into an issue with trying the cleanly wire power for the whole fuse block, I don’t know if I can power the “essentials” (lights, power seat, windows, radio) with just one or two wires. The second issue I’m running into is where to grab ignition power for the s side of the starter from.
anything will help. Thank you

I can provide pictures if needed
edit: it only has the small plug on the drivers side firewall in the engine bay, everything else is gone