Man oh man your asking some questions and a half there Kweli!
Let’s start from the top, you’re right about Ben running 9.70s windy in the 80’s. In fact it was in 1987, on the 24th January in Perth,AUS.
He had the help of a +3.5m/s wind-assistance.
The race was hand-timed, but it has been said that the hand-times were very accurate, almost as accurate as F.A.T times.
I don’t know who else was in the race,that’s gonna take some research, but from what I’ve heard Ben was virtually running on his own due to the quality of the rest of the field.
It is the amonst the equal 2nd fastest 100m of all-time(if we take into accounts wind-assistance over the limit and hand-times/manual times any conditons, any time-recordings, etc.), and the equal fastest ever by hand-timings/manual timings.
The fastest time on record by either hand or manaul is 9.7s by Donovan Powell(JAM), Carl Lewis & Olapade Adeniken they went 1,2,3 in Houston on 19.05.1995
Other windy manual 9.7s are; Osvaldo Lara(CUB) (+3.8m/s in 1982), Rod Mapstone(AUS) (+6.8m/s in 1996) and also by Sayon Cooper(LBR) (+8.1m/s in 1998)
And yes only Obadele Thompson’s(BAR) 9.69s windy (+5.7m/s in El Paso on 13.04.1996)
Wait I’m explaining all this here are some good links: