For my first pinball machine I kind of made an impulse buy of a '78 Williams World Cup for $75. Playfield was in decent condition with only a few minor things missing. Backbox was empty of any boards / displays, the backglass looks "okay". Also found that all of the wires from the bottom had been cut off at the point where they would go up to the backbox.

So far I was able to find the missing playfield plastics and purchased an MPU board off ebay at a decent price that's already been gone over and tested. I am wondering if taking this on will be a complete money sink trying to re-wire everything or to slowly work on it little by little picking pieces up as they become available to me. Working on getting more photos added.

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I purchased this to keep and play, maybe one day sell to afford another machine.

All very good points. I should point out I began taking pinball repair classes as PAPA this year.

Should I start working on the cabinet itself or wait until I have all the parts and make it playable before that?

That would be awesome considering it is missing the spinner, thanks!

I've already been taking notes with this restore

I personally think the kickouts are a unique feature on this game.

So, would it be a feasible task to try and find a new playfield wiring harness? I'm gonna start working on the cabinet soon and I keep staring at all the cut wires and it is looking like a bigger job than i might be prepared for.

A huge project would probably be a understatement. Head is completely empty.
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This is probably what I will end up doing. For the time being I am going to clean up what I can of the cabinet and playfield and wait until I find exactly what I will need to finish it. Yes it was super impulsive to purchase this wanting my first pin, but I knew I wanted an early SS that would be somewhat of a good learning experience.

Thank you everyone for the advice!

Well I have been patiently waiting and keeping my eyes open. Finally found someone parting out a world cup. He's agreed to send me the wiring, displays, driver board, PS board, transformer, and the remaining play field parts i am missing. This restore may actually happen.