I recently acquired a nice 1987 IROC with 27k miles, all original. The valve stem seals are leaking which is normal for an older vehicle and I want to replace the heads, intake gaskets, rear main seal and valve cover gaskets. My question pertains to the bearings in the engine. Since we cannot see the bearings, what kind of processes happen to bearings in vehicles that have been sitting for years and years? Is there any special type of oil I should be looking into that will reverse any damage to the bearings if any? Sort of like a re conditioner? Thank you.