Hi everyone, I havent been here in awhile so Im back, YAY

. I have a 1984 Celica GTS, 22re W/189,000 miles, 160 psi in the first three cylinders and 165 psi in the fourth, idleing at 750-800 rpm, and Im geting 30-32 mpg Highway stock. I got it for $500 and fixed it up for a school project. Now that im driving im really thinking of making it nice by fixing the body, inteior, engine, ect. and I dont want to spend too much over $3,500. This will probably take a year or two. I dont need to make this a 10sec. car but a nice car that has some power and wont effect my gas mileage too much. What should I do?