Right, hit a major stumbling block. Everything is ready to drop the engine. I've separated the shock at the bottom and the rose joints so the back end will lift off but keep the shock and hoop on the frame. The swing arm pivot is drifting out nicely so that good. The big snag is the two engine bolts. They won't shift. The front nut came off, but the main bolt won't shift. I've used plus gas soaking most of the day and I've used my cordless and mains impact guns followed by a 2ft breaker but although the allen socket rotates a few mm, the other side of the bolt doesn't so I'm afraid something is going to shear.
Apart from more plusgas over a couple of days, I'm out of ideas. A blowtorch is out of the question as I am not repainting the frame.
Any ideas? Any stories of bolt removal success or failure after the same siezed situation?