The 1989 "Busch Twin 100's" was a day-long event held at Thompson International Speedway on August 9, 1989. Two distinct series raced that day. Did you mean:

1989 Busch Twin 100's (BNS)-Bobby Dragon grabs the Busch North victory

OR

1989 Busch Twin 100's (WMT)-Reggie Ruggiero claims the Winston Modified Tour race?