49 gmc g100 long bed questions

[Lookin4the1]

I just bought a 49 gmc g100 long bed and have a few start up questions.

what is the exact wheelbase and do they make an s10 frame around the same length without me having to cut my bed.

I also need to inquire about cheapish radiator options. I'm going to run the 235 that i got with the truck for the rest of the year until appropriate funds are saved for the off frame build.

Wiring harness.. this truck came with 0 wires in it at all..but the headlights and running lights are already setup for 12v. the gauge lights, not so much. whats the best option here?

lastly, where is everyone getting their patch panels for sheet metal. it came with a left side cowl, but i need rear cab corners as well.

Thanks for someone answering this 8 part question. picks will be coming soon.