GT4 is Quick, but a GT is lighter. Swaps are a pain in the rear, but the GT is lighter. Swapping takes time so you'd need a ride in the mean time. GT4 wouldn't have the issues that a swap would have. Tell your parents that you are buying the GT4 to pull the engine and put it in your car
!! Yours is lighterso it would be that much quicker, and you would have all the items for the swap right there. No searching for parts, clips, etc. Then once you get it, paint it the exact same color and setup as yours. Go race a couple of fools in yours one week end, then the next week end take out the GT4 and find them again. They won't know what hit them
: Drive the GT4 for a little while and see which you like better. If you do decide to do the swap, cos the GT is lighter
, you have all the parts needed, and then you could turn around and part out whats left. Tell them the guy has a couple people interested and you don't want to lose it!!!