I buy ethanol free gas whenever I can. It's a good idea for the limited use an old truck gets, sitting more than running, same for the lawn mower and forklift.

Don't worry about a fuel additive.

If the engine is original, not recently cleaned and rebuilt I would use a non detergent oil.
If it is rebuilt and known to be clean inside I'd use normal straight 30 weight oil, like Shell Rotella-T SAE 30.

We should see your truck in 6 or 7 hours from now.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-