Jerry:
You are correct about the closing date. I was a year off. According to this web site
O.C. History Roundup: Orange County International Raceway, Irvine OCIR closed October 1983.
According to this article
Firebird Raceway closing down; drag racing possible in 2014 | azfamily.com Phoenix and quote from the NHRA, Firebird opened in 1983, but it also mentions Charlie had a 28 year lease which would make the lease start in 1985. “We have had a very successful partnership with Charlie Allen and his team during their 28 years as lease holders of the facility and look forward with much anticipation for the 29th annual NHRA Arizona Nationals, February 22-24, 2013.”
In your pictures can you tell if the tree was a hanging 3 amber back then? It was when I went to Firebird for the first time after OCIR closed. OCIR used to have a 5 amber tree on the ground until the fuel altereds started mowing them down. Then they went to the 3 amber hanging tree with sequential lights on each end of the cable for reaction time.
I know for a fact that OCIR was cleaned out and all the equipment went to Firebird which makes sense. The Irvine company would have loaded it all up into a dumpster.