Have you drained and flushed the coolant?
The VIN number on the engine is on a pad above the starter. Should match the one on the passenger firewall and top of steering column if it's the original engine.
I'd replace all rubber fuel hoses, in the engine compartment and the trunk.
I really have done nothing so far. My time is very limited, and I won't be driving the car for quite some time.
is there a pic of the firewall location? I can't find the VIN on the firewall. The car is clearly original, with matching paint and an original VIN tag. I don't see the firewall stamp though.