I have a 1965 Honda c110 that I am rebuilding. I'm trying to get the crankcase off to clean out the inside. All the bolts are rusted stuck I cannot get them out. I've tried a tourch, pb blaster, stripped screw removal. Any body have another way? Or could I just cut away the crank case and buy a new one. Also if I do that is it possible to weld the case back together?