Cab removal help

[scotty101]

I am working on removing the cab i have the rest of the truck stripped down to the frame. I get the front two cab mounting bolts out but the rear ones just spin are there nuts on them or something? and where is the best place to lift this off? i was thinkin of laying boards underneth to span the two braces and lift up on each side with forklift and a tractor then roll the frame out from under it? my truck is a 1987 lwb reg. cab. thanks for the help