My uncle passed away and my aunt has offered to give me the car as long as i keep it. She says my uncle worshipped the car. Im lost!!!!!!!!!!!!!!!!!!!!!!!!!

It is a limited production vehicle. The 1987 was the last year of the Grand National. It is a 3.8L Sequential Fuel Injected V6 with an intercooled Turbo-charger. The 87 was the highest output ( horsepower and torque) of the model run.
Retail value was about $30,000. Now it's priceless.
Quite a collector vehicle.
I'll hunt you down and do you in :-) if you sell it or destroy it. I'll come back with your Uncle to haunt you the rest of your life. LOL, I envy you.

Not your daily driver but you will need to drive it or at least run it to keep the seals in good shape. If the owner's manual is around you should read it. There might be special instructions for "cool down" of the turbocharger.

They don't make cars like they used to; if it's offer and was cherrish, someone thought they had a good car I have a 91 Buick reagal and she's little to fix I've owned her 8 years love her.

Some people have all the luck. This car is getting rare, and is sought after by many. It was one of the fastest muscle cars. It's value only grows, so keep it in good shape. Love it as your uncle did, and thank your aunt for giving you a pot of gold.