A 950 top should work fine with a 980 bottom. the only difference that I can think of is that the 980 has the huge hole cut in the left rear for the exhaust duct. Both of the Hustlers I've had the bodies were tough to get lined back up when I put them together. In the case of the 950 the body had been split for 15 years. I only had the top off the bigfoot for a few weeks and it was still tough. The cage that I built for the 950 bolted right up to the 980 so that tells me that they are dimensionally the same
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.