With it misfiring, I wouldn't drive it very far at all... and honestly, I would be cautious to do so in case of getting stranded.

When you say the coil pack was wiggly... do you mean its damaged?

 

 

Check for a failed head gasket - very common in these engines.

 

 

Did you not have an overheat event?

 

 

Have you checked your coolant level recently?

 

There are 3 things that cause misfires: compression issues, fuel injector issues or ignition issues. You say car does not over heat any longer but what caused it to overheat in the first place? Of course a blown head gasket can affect compression.Heat destroys electronics so its possible the transistors in the coil packs could have been affected and yes changing coil packs to see if the misfire follows it good to do.Fuel injectors, without a fuel pressure gauge and fuel injector tester to do an injector balance test the only thing you can do is ohm each injectors and see if in spec. When you say you valve seal I imagine you mean valve cover gasket and not the seal on the valves. I would not drive a misfiring car because fuel is not being burned completely which ends up on your catalytic converter -not good not to mention cylinder wash and thinning of oil both destructive to your engine.

 

its possible for coils to melt when the engine overheats

replace the 1 and 2 coils, clear the codes, see how it runs

compression test if necessary

 

 

autolite are junk, never use those again