So let me start with saying thank you for everyone who may respond to this.
Alright so I bought this car from a guy I knew through a mutual friend. It had been sitting for 16 years and all because of a brake booster. So I get the car and have my shop take care of it for me. I got the brakes and everything done, new fuel pump, complete tank and line clean, radiator flush, and oil change. I get it back realize the headlights aren't work so I take it back and there is a vacuum leak around the carb so I got the mounting gasket replaced and some new vacuum lines which I get it fixed enough to not worry about them getting stuck going up or down. It had been in the shop for roughly a month and I finally get it back. Drives amazing and has had no issues. Till i start noticing its idling differently. I was told by a buddy that it sounds like it was running lean. I continued to drive it because I needed it. So fast forward a week and a half and I was driving home. No issues till I turned on to my street and started to slow down. The RPMs stayed high like my choke was engaged and then I put it in park and the RPMs skyrocket. Like up to 4000. I immediately shut the car off and havent had time to look into it all that much. I know i should have the carb rebuilt so I'm going to get that done. But is there anything I can check before I jump to getting the carb rebuilt? I heard it could just be the accelerator pump diaphragm. Any opinions would be great. I am not really tech savvy when it comes to this car yet. I had an 84 before this but this car is way different obviously. THANK YOU!!!

 

Does it still have the computer controlled carb and distributor? Check engine light work? Codes? Throttle closing properly? TPS sensor? Mixture Control Solenoid? There is a lot of info that is not in your post that could have big effects on the answers you get.

 

This is all I got.

 

Photo doesn't show much about what is and is not there.
Maybe post another one without the air cleaner.
As for the high idle rpm, it doesnt mean the carb needs a rebuild, could be something very simple.
My 81 did this, it was one of the plates in the carb had caught in an open position so when i was at idle it was as though i still had my foot on the gas. May pay to look at this too.

 

Throttle cable hung up on something. Something simple like that. Pull air filter and check throttle movement. If you know too little, post close-up pics both sides of carb. Throttle opened and closed.

 

Welp ironically enough, I finally found time to look at it and the front plate was stuck slightly open! I got busy right after I jiggled the carb a bit and it went back flat so i haven't started it yet but i bet that was it. Thank you guys for everything.