>>12919
>headlights
Your car should already have halogen headlights, which should be as bright as every other car on the road. If they're fogged like pic 1, your could try to polish them using one of the products made for the job, or replace them with new ones at about $15 each. I'd recommend fixing your dimmer switch before you replace the headlights, though.
>>12928
>have higher light output.
You could do higher output, but be careful about the wattage. Your original system was designed for 35W low beams and 65W high beams. If you exceed this without increasing the wire gauge, it could overheat the stock wiring. At worst, it could start a fire. There might be some bulbs out there that are brighter with a similar power draw, though. I don't know much about aftermarket headlights.
>>12921
>Is it just the fans that stay on or do both the compressor and fans run after turning the car off
>>12922
>I think only the compressor for the air conditioning keeps running
It sounds like there are some misunderstandings about how a GM AC system works. Follow along in pic 2, bottom left and top right. The diagrams are from my 1969 manuals, but the system is almost identical on your Trans Am. Basically, it is a system where refrigerant flows in a circle through the engine bay. The compressor is basically a belt-driven pump with a 12V clutch connected to the control unit that controls whether the AC is on or off. The compressor pumps the refrigerant through the condenser in the front of the radiator to convert any gasses into a liquid state. This flows to the drier, which sucks the moisture out of the system. The reason it does this is because it then flows through the evaporator core, where it cools the chamber by evaporating the fluid. If there is water in the system, it could build up, freeze and block the system.
There are two valves attached to the evaporator that regulate the process. The POA valve is basically a thermostat that cuts all flow if it gets too cold. The expansion valve basically causes a regulated restriction that creates pressure in the condenser and a vacuum in the evaporator. Temperature = pressure / volume. The volume of the system is fixed because it is sealed, and the pressure in the condenser increases greatly because of the compressor fighting the expansion valve's restriction, creating pressure, and the temperature in the evaporator decreases because it is full of vacuum. The changing pressure also changes the boiling point of the fluid, which helps to convert it to a gas when it passes into the low pressure zone at the evaporator. After the evaporator, the refrigerant circulates back to the compressor as a gas, where the cycle repeats. The gas turns into a liquid, condensation is removed, it is converted back to a gas at a regulated rate, and then it again travels through the compressor.
The airflow is shown in the top-left. In the cowl area, there is an intake for the blower fan. This pushes air through the evaporator and possibly the heater core under the dash. The temperature control on your dash basically just controls how much air flows through the heater core, and how much bypasses it. Max should both shut down the heater core completely by closing the water valve and moving a door on the blower intake so that it pulls in already cooled air from the cabin to cool the air faster than in Normal mode. The air is always cooled 100%, then heated to the desired temperature. If the AC compressor is off (Vent, Heat, or Defrost modes), the evaporator will warm to room temperature, but air will still flow through it. The air then goes through the vents in the cabin.
>tl;dr
The compressor pushes refrigerant, not air, and it can't produce any output if the engine isn't spinning. The reason air is coming out of the vents is because the blower motor is running. It is possible that the compressor clutch could be active with the engine off, however. My guess is that there's just a short somewhere in the blower's power feed.
>>12927
>I need opinions first on those SFX louvers, nobody's really said anything about their thought.
They look good to me. I don't think they're any better or worse in appearance than stock, just different. I think these look better than a lot of aftermarket louvers that I've seen. I'd buy them because I think that wing on the back looks naked without them, but I'd do it near the end of the project.
I promise I'll try not to write huge text walls every time I post.