well man ill tell you...it really depends on what you want out of this car. you can open up the intake by getting rid of the little box with your air filter and putting in a little bit of tubing for a cold air intake. that would boost your hp. if you are going for more of a wow that car is fast an engine swap is a lot of work but can get you more of what you want. a chevy 2.2L 4 banger should fit and there are alot of upgrades for it. now the sun roof that is another animal all together. its alot of body type work. you will need a lot of tools such as an air grinder, mig welder, and such. you can get it done professionaly for rather cheap though. just go to the nearest glass replacment place and they can direct you where you need to go. so it is all what you want to make the car into. i can give you more details if you give me more to work with.