I have a GT-R kitted GTS-T I more or less refuse to put a GT-R badge on it for reasons stated above, it's not a GT-R and never will be, even if i was to put an RB26 in, it's just not (unfortunately)
end of the day it's your car, do what you like but that's my 2c In saying that, a lot of people, and i mean a LOT of people that aren't as cluey to pick up the rear guards do think it's a GT-R which is quite funny, I've even had GT-R owners compliment my "GT-R" lol it's sad however how much their tone changes when i say it's a GTS-T