So i finally got the old winch off and it was an ordeal. As i mentioned, i cut the cable with a reciprocating saw. Then, i cut the two bolts i could see with a dremel, and drilled them out. After i picked up the new part, i realised i had six bolts to drill out but could only see two. I smashed the plastic housing in the winch and found the other four bolts. I also did some surgery on the housing with my angle grinder to get better access to the bolts. Cutting the ends of these bolts wasn't as easy aed the first, so the ends were more uneven, which meant that drilling them out was a pain. I didn't do that great a job, and there were bits of partial bolt left because my holes were off center. Drilling was a pain and i went through a few bits and it took a long time. I ended up enlarging the holes but that didn't help much, so i finally just chisled out the partial bolts, which finally knocked the part loose. My advice would be to change these bolts every 100k, as they are a bear to cut out.