Jim's bass is a '77, afaik. He does have an older fretted Series as well.
It's possible that the SVT might have been backline. When I saw him he had a much smaller rig. I don't remember exactly what, but it might have been a Walter Woods or something of that nature. Or now that I think about, he might have been using an F2B.
There is a Bass Player feature from a few years ago that outlines all his gear. One of my heroes, for sure!