I talked to the owner of this neat little rig in Topeka last weekend. He bought it new in 73 and put 3 million miles on it. He sold it to a guy who did this conversion on it. I think the guy hauled a race boat with it. He bought it back and tows his Stock Eliminator pickup with it. I can't remember what it's powered with now but we were talking about tire speed ratings. He said (Speed ratings? I've been 125mph in this one).