Great truck Charlie, I had a couple of them years ago.
Not much difference between an A and a B, mostly the year it was built.
All the B's had the aluminium grill that went pretty much right across the front of the cab, the later A had the same grill I think, at least mine did. I had an A and a B.
Standard spec has 903 natural, 9 speed and SQHD 38,000 lb diffs with wedge brakes. 15 speed was an option.
The Eagles had 903 natural, 15 speed and Jakes as well as the red/white paint scheme and 38,000lb diffs.
The 3074 was the same except it had 44,000lb diffs either Rockwell or Eaton.
As far as I know, all the bogie's were on Hendrickson walking beam suspension which rides terribly.
The 3072 was the 8 wheeler.
Any with a VT 903 in them will have been retro fitted.
The 903's are a great motor, make sure it has the right inhibitor in it though otherwise electrolysis will set in very quick. The camshafts were a bit susceptible especially with Jakes fitted, but if it is running clean and not blowing white smoke there won't be anything to worry about.
Biggest problem with them is rust. Rust in the cabs, and because they are all double chassis rail, between the chassis rails.
Hope you get one mate, I love them.
