Wow. Just wow. You make it sound like Billy was some punk kid under everyone's feet in 1988.
Let's see now... 1988, I believe that would've made Bill about 24 and, if I understand things correctly, fully involved in his father's racing operation.
I think there are better questions like a) How the hell would a chassis builder know the total dollars involved in Bob's operation? b) Why would Bob share the numbers when he was categorically secretive about EVERYTHING else?
Nothing personal John, but I'll take Bill's word over yours.