Let me add my 2 cents worth. Yours is a 90 - with some miles I'll guess. I'm amazed at what kind of mileage these little engines will handle - mine has just over 240K and would still be running well if it were not for the plastic valve that controls the heater. It dumped all my coolant on the freeway and before I knew it was hot (stock guages stink) I'd cracked a head. It still runs but I'm replacing the motor over Labor Day.
Back to you - If you pull the engine, you can replace the oil pump, water pump, and timing chain while you have it out. You can move your AC out of the way and not disconnect it. The toughest job will be to get the bolts out of the exhaust manifolds - lots of penetrating old helps. If you are careful, maybe take pictures, the wiring has specific connectors that won't let you plug something back incorrectly. I'd suggest adding manual water temp and oil pressure guages while you have the motor out. You can use ramps to get under the car - get everything disconnected then beg, borrow or rent an engine hoist. You don't have to take the trans out too - but you do have to figure out a way to keep it from dropping and ruining the rear trans mount. I suggest a rachet strap or bottle jack. If you have the manual - it will tell you what to do in what order.
There you go - I've done it - it's not that hard. Keep changing the oil after all of this and you'll probably have a long mileage engine.