Hello, I have a 69 d100 that I am trying to get started. Been sitting for years, the prior owner started a new wing harness and never finished. I'm trying to get the engine running and complete it from there but I do not trust the wiring.

I've got the starter working and now trying to get spark which I can't seem to get. It has a stock coil and msd 6a box. Any way to test these as I couldn't find anything? Also is there something I can pick up cheap and get this running instead of keeping the msd?

Thanks
Ryan