i got it & the doubler mounted. i will post some pics if u like. i used 2 stock crossmembers & stock replacement poly mounts. the rear one that the doubler mounts 2 i left stock the frt one i modified for the frt d-shaft to clear it & made some 1" spacers to go between the 203 adapter & the poly mounts. i never relized it but the "feet" on the 203 adapter are shorter than the ones on the doubler adapter.
the biggest pain was the headers. the pass side hung down so low the d-shaft would smack it when it came up. i took the header & cut the tubes off & shortened them. the collecter is higher than the bottom of the frame rail now. i believe i can sqeeze my exhaust between the frame & the doubler on that side now.
i used bbc headers w/ a set of caddy header flanges