Though we're treading off the beaten thread path on this one...here was the state of SWDiv/MWDiv in 1989. This was an email I sent to a guy in regard to the history of my SSA Shelby CSX...

Pulled up the logbook...it was issued 11/11/88, first event
11/12-13/88 at Texas World Speedway. Bill Saunders drove the car in
the SCCA driver's schools the weekends of April 8th 1989 at TWS and
then the following weekend of April 15th at Hallett Motor Speedway,
the car's 4th and 5th race weekends. He apparently passed the second
school, as he finished 1st in the SCCA Regional on Saturday. That
first year the car also raced at Hutchinson Aerodrome in Kansas (an
ex-WW2 Navy airfield), the very first SCCA National at the then-new
Heartland Park in Topeka, another ex-WW2 airfield in Big Spring TX,
the Ponca City (OK) Grand Prix July 4th weekend (probably where that
photo came from), again in Big Spring, won the Solo 1 National
Championship in Showroom Stock A at Hutchinson Aerodrome, finished 23rd
in the 1989 SCCA Runoffs at Road Atlanta, then topped off the year at
the "Bass Ackwards" (reverse direction) annual race at Hallet in
November and the "Early Bird Enduro" at Texas World Speedway in
December.

And it did all this while being driven to each race with tools and
tires in the hatchback...busy year!