I bought a bunch of old tractor and engine magazines at a swap meet a couple weeks back.
The July 1994 issue of Gas Engine Magazine has an article on the resurrection of Bush Hog D4-7, serial no. 7061 built in Selma, AL. The tractor was sold new by Askew Tractor and Implement in Harrison, AR. Later it spent time in Taylor, TX and then went to Leander, TX.