Buying 73 been sitting outside 20 years Options

[LukeD]

Jumping back into the 914 scene, got a lead on a 1 owner signal orange 73 - 1.7 that has been sitting outside in Central Valley California uncovered for about 20 years ("ran when parked"). Went and looked at the car yesterday, little surface rust on the battery tray, no visible rust under it, passenger long has no visible rust. Seems complete but obviously weather beaten. He only wants a couple hundred dollars so I'm not going to pass it up. Looking for a checklist of absolute musts to attempt to get the car started

Must;
- Remove fuel tank, clean and check for rust
- replace all fuel lines and filter
- replace injector seals
- soak injectors? in what?
- change oil with what type?
- clean all contact on relay board and fuse panel

What else?

Anyone point me to some threads of those that have done this before? I've searched for "resurrect" "revive" "sitting outside" no good hits.

Thanks!

-Luke