both can be made equally as fast. You are going to take a huge hit on the gt when selling it and going to dish out a lot of money. The smartest thing you can do is make your mind up now. Dont buy stupid shit for the car anymore cause you want to make it a little faster for now. Pullies for instance you'll gain a few hp now but if you go power adder they need to go. Realistically your going to shell out 10k extra on a cobra at least. For 10k i'd build a motor, throw on a blower or turbo and kill cobras, but thats just me I like surprising people better. Remember having a 2v you have the upper hand as far as drag racing goes you have a solid rear. Its a better starting ground and believe me you can fly in a 2v, just everyone gives up on them