The mount is two parts, one is the iron bracket that is bolted to the engine block and the other which is the true mount is lag bolted to the stringer and has a stud the goes through the bracket on the engine. The bracket can be cleaned up and reused but youíll probably have to cut the rusted nut off. I would try spraying it with PB Blaster the heat the nut with a torch and finally use an impact wrench to see if you can get the nut off. Note once the mount is replaced the outdrive should be removed to check/adjust engine alignment else you can have premature failure of the engine coupler. I replace the exhaust manifold and elbow/riser. Note these are Mercruiserís dry joint design but you can find aftermarket ones if you want to save a few dollars, however the aftermarket ones typically arenít painted.
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2