The deadliest item on your car is your timing chain. If it breaks or skips a tooth, your engine is toast. Depending on the last time the chain has been changed out, that would be the first repair I would do.
Tear down the engine and complete, new head gasket, timing chain, profile gasket, head gasket bolts, possible timing chain guides, oil pan gasket, new shifter linkage, upgrade fuel injectors (very easy to do and cheap), heater delete on intake.
Again, I don't know how many miles are on the car, but if the profile gasket has not been changed out, it will cause damage sooner or later. The rubber gasket will break down plugging coolant passage ports. Not to mention that it will start leaking coolant. Mine was good one day, bad the next.
The oil pan should be taken off to check for loose bolts. People are finding several bolts from the upper oil pan gasket in the oil pan. I found 2 bolts on my car. These bolts have been reported to starve the engine of oil.
I seen that you live in Indiana, if you live close enough to Joliet, Ill. ( NW Indiana) I can help you with some or all of these repairs. Let me know.
john