I had heard that the dealers would split the manifolds to make dual exhausts for more power from some of the old timers around. Can't tell in pics if that is what it is. They tell me they where brazed and homemade looking. But sound good.

29 Ford
http://s1078.photobucket.com/user/c...4-BF50-713F5EDE5632_zps8zoj9vfq.jpg.html
31 Ford
55 panel
95 4 door power stroke
49 chevy 2 ton
47 2 ton grain bed w/ hoist.
Many trucks waiting