1973 duster 904 mount trouble

I've tried all that's mentioned with no luck.the cross member van only go in 9ne way.bevause the bracket for holding the mount is on 9nly one side.ive tried tak8ngvit apart.putting bolt in center and lifting it up tgat didnt work either.then I tried a really strong ratchet strap.no luck.then 8 tried a heavy duty c clamp.almost got it but not enough.