if your serious about this, like for real serious...Sorry about your luck but you need to build an entire tube chassis, integrate it into the GP chassis, fully cage it and THEN you MAY be able to get a working rear end under it but still need to do something along the lines of a 4 link rear end...Anyone you know understand how to make a custom 4 link? I helped build a RWD 93 Probe with a 306-C6-8.8 and it was totally retarded! Fast and insane, but stupid amount of time and money