Happy to see your car running like it should. BTW, was this car parked for a while before you bought it??
If it was my car, I would drop the engine completely because you may want to replace more things
and you'll be able to inspect to make sure everything is good. Hell of a lot easier to replace the manifold gasket.
If you break 1 exhaust manifold bolt in the cylinder head, I don't see anyone drill / tap the hole with the engine in the car.
I know this isn't the news you want to hear, but its the easiest way.
88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.