It raced in the late 80s/early 90s era in La Rana. I worked on it a bit in the early 90s at a Bronco shop in the Phoenix area. I don't recall if it raced the 500 or the 1000.
Been around a long time and been for sale for quite awhile too. Seemed to be a decent deal the last time I saw it on CL - maybe 19-20k? But I haven't laid eyes on the truck in over 20 years so I don't know much about it's condition.