State Farm coverage questions for a classic car under restoration

I’m trying to clarify how State Farm treats a vintage car that is temporarily off the road for restoration. Before starting work, I’d want to confirm a few points with the agent:

1. Is the vehicle insured based on actual cash value, stated value, or agreed value, and can that value be updated as restoration work increases its worth?
2. Does coverage change if the car is stored in a garage, partially disassembled, or has the engine, body panels, or interior removed?
3. Are bodywork, paint, electrical repairs, and engine rebuilding covered if stored parts or the car itself are damaged by theft, fire, or another loss?
4. Is standard auto coverage sufficient while the car is non-roadworthy, or is a classic-car policy or endorsement more appropriate?
5. Once it is driveable, are test drives, maintenance trips, shows, and occasional pleasure use treated differently from regular commuting?
6. Would receipts, photographs, appraisals, or a restoration log be needed to support the vehicle’s value or a claim?

I’m especially interested in what other State Farm customers were told before beginning restoration, and whether the final policy wording addressed the car’s storage location, disassembled condition, permitted use, and valuation.