Any clues for RX7 or GTR brakes?

[GLOVAL54]

Hi i have a oval on a IRS BJ pan and am interested in brake options. RX7 and Nissan GTR brakes (brembos) are avauilable from Japan very cheap Hear in Australia . I have heard wispers re such conversions but not anything solid? I have a set of 914 for the rear and want some biggins for the front under a set of 17" sport classics. should I go 944NAs ?They are reasonable to buy here seems any easy route. I have no Idea really are they alloy? or is that what makes the turbo version popular?