pretty much any jap coupe is gonna have pretty limited leg room in the rear begs the point why even bother with the rear seats. Looking at pics of the interior of R34's and R33's on import sites they seem to have very little legroom in the rear even in the sedan.
My auntie had an Integra Same shape as the original Type R's and it was very cramped in the rear.
If you really wanna carry ppl around in the back i'd seriously contemplate getting a sedan for one of two reasons. One they'll bitch and moan in the rear and you'll feel their knees in your back. Two they are gonna be climbing in and out of the car over the front seat and eventually they are gonna fuck it up.
Get an R33 Skyline sedan they go for around 13-20K and are just as quick as the coupe and a bit rarer. Doesn't really solve the legroom problem but atleast your interior will be in better condition.