Ok so at idle everything seems to be perfect, once I drive down the street and let off the gas I hear a squeeling noise. Now most might think I'm a dumbass and I need new belts or my water pump is going out, but here is a list of parts I've replaced within 2 months.
-water pump
-all belts ac/alternator
-thermostat
-radiator
-spark plugs
-intake gasket "done two days ago and is most recent"
-oil change
-fuel filter
So its a stock 12a with a emission deleted Nikki so no smog pump/belt.
I am horrible when it comes to diagnosis by the way.

 

oil filter was of course changed as well

 

Did you tighten the alt belt to tight? If the alt belt is too tight it could be wearing out the bearing in the alt shaft causing it to make noise. The belt should be loose enough to turn 90 degrees.

 

Once you remove the air pump the belt for the alt and fan tends to slip.

Banzai racing makes a stock diameter dual sheave pulley that allows you to run a pair of belts. Fixes that problem.

Pulleys & Belts (86-91 RX-7)