Just a tip, cut out 2 large circles in the rear window for cooling. The fronts can only have one 2" hole but the back can be completely cut out (ROAR rules). Also for easier removal and mounting, get the single LONG body pins. 2 is better than 4.
Nice clean work on the body. Put a zip tie on your fuel tank for refueling. You have 2 options for ease of refueling. Either make a loop for a handle (easier to stick your finger in the loop than grabbing a single handle) or get a really long ziptie (1 foot) cinch it down in the hole on the tank lid and have the other end sticking out the rear window (after futting ou the rear). that way when you refuel, your foot blocks the car andyou have 2 hands free to pull the lid open and refuel. If someone is refueling for you, you tap the gas a little to clear the throat as his foot blocks and he pulls and splashes. (Only really important when racing).