I'm buying a van that has been sitting for 5 years... Run only once
every year or so.. long enough to warm up the engine. Every year was
the year he was "gonna do something with the van" but building his
house was taking up all the time. It was covered with a car cover (i
know paint abrades)... Currently it does not leak and all electrics
work except the front blower motor (which worked 5 years ago).

Before being laid up... regular maintenance, Mobil One... coolant
hoses changed, new paint (but not with windows out so theres some
rust near the window seals. This year Rear brake lines were rusted
out... those got replaced.

Currently running. tires are cracked... good thing I have a set in my
brownstone front yard, lol.

My plan is bring my tires. change the oil, do some driving, change
the oil again and auto tranny fluid.

Jump the fuel pump and listen for noise... test fuel pressure. I
think fuel lines were changed,

Can I disable the Idle stab. and just pull a spark plug wire w/o ill
effect to the ignition?

I'm also going to bring my O2 sensor monitor and see if it's bouncing
properly.

Test for brake fade, rusty rotors and burnt tranny fluid and drive
home 6.5 hours at 55mph.

Any other suggestions?