Its easily done mate, the coolers are much more efficent than the standard ones if you give your car a blasting with the standard cooler on then run out and feel the end of the cooler where it enters the TB it will feel warmish, if you do it with the rx7 one it feels much cooler tried and tested last weekend on my mates GT.
Heres my old one
Thats a nice bit of information there, I was running 1 bar on that setup with no bov for about 7 months without a problem.
I then changed to hybrid turbo, fmic, greddy E-Manage and 1.2 bar of boost I ran the first 3 months without a bov but now I have fitted one but only because I like the sound of it.
ever looked at the vent when an rx 7 one is fitted?
standard airflow can get to all of the cooler,
but fit an rx7 one and it starts about 1/2 2/3's way up, so airflow is reduced.
Post it up , I wanna see what it looks like for ideas!