Not to bash Gene's youthful enthusiasm but... Although the larger '75 calipers are a direct bolt on, they aren't plug and play. There may be a wheel clearance issue. Second the bleeder screw and brake line are on the same end of the caliper, the top, the GT's brake line is on the bottom. Third it is utilizes an ISO bubble fitting rather than double flare which I believe to be more commonly used and therefore easier to find or have someone make up new.
Harold
Harold;
I put OPEL 75 calipers on my wife's 74 Sportwagon with her STOCK 74 wheels and no clearance problems. The hose issue is not that big of a problem either, just get the metal ends off the BMW 320i and Manta front rubber hoses, problem solved.
Gene Buttinski, that is almost a plug and play, the GT is a little more involved. If it's not a daily driver as mine was then by all means upgrade now. Don't let me rain on your parade.
