Its a challenge now...you could take the rear trunnions off, undo the nut and lever off the trunnion and bushes. You will then have a bit more wriggle room. With the rear scuttle in place its awkward, its not a delicate operation, might need some serious riving down and back. If that fails its time to take the radius arms off and cut through the front trunnion pin...if you go in with an angle grinder (use a slitting disc) through the inner bush and cut the pin off, it won't be nice, it sounds drastic but may be the only way, the bush is only 3 or 4 mm wide so amke sure you go in square, at 90 degrees or you may cut into the subframe or trunnion.
Before removing both the radius arm brackets remove as much muck and debris as possible and soak the bolts (4 on each side) in WD40, and even apply heat, like the ones that have snapped they rust badly. Try tightening them a fraction first to break the rust and then work them left and right with plenty of WD, its not easy or quick, but a lot easier than sorting a broken bolt.
Its unfortunate but the bolts have sheared off long, which is unusual, I guess there has been some not so good bolts used before.....either use stainless or blather the new ones in copper slip when rebuilding.
