HOW MUCH OF A DIFFERENCE WILL A V-AFC CONTROLLER MAKE IN MY STOCK 93 EX SEDAN? AND WOULD IT BE WORTH BUYING?

 

not very much on a stock D16Z6, and how did you get away with all those caps????

 

For your motor to make any real power, you'd either have to build the entire engine or go forced induction. If I were you, I would consider a motor swap, or possibly a good nitrous setup if you don't plan on spending much money.