[Roadtrip]

On the oil filters, call Centerline and/or IAP. I think the manufacturers make these things in batches, so you inevitably have shortages periodically. I usually keep several on hand.

By "throttle position switch", I assume you mean the "Fuel Cutoff Microswitch", which is the correct nomenclature. When replacing the microswitch, be careful of the small rubber grommet over the push pin. Those are "no longer available" . . . . . period-dot. Only salvage.

While the pump is off the car, you should take some time to drain the old oil, clean, and inspect it. Don't forget to fill it with fresh engine oil after you install it. I recommend that you put a tag on it to remind you to do this. It's VERY easy to overlook after installing.