Table:
text: Texas Motor Speedway
NASCAR Sprint Cup Series race winners
NASCAR Sprint Cup Series race winners
Season Date_ Winning_Driver Car_ Sponsor Make Distance Avg_Speed Margin_of_Victory
1997 April 6 Jeff Burton 99 Exide Batteries Ford Thunderbird mi (km) mph (km/h) 4.067 sec
1998 April 5 Mark Martin 6 Valvoline Ford Taurus mi (km) mph (km/h) 0.573 sec
1999 March 28 Terry Labonte 5 Kellogg`s Chevrolet Monte Carlo mi (km) mph (km/h) UC
2000 April 2 Dale Earnhardt Jr 8 Budweiser Chevrolet Monte Carlo mi (km) mph (km/h) 5.920 sec
2001 April 1 Dale Jarrett 88 UPS Ford Taurus mi (km) mph (km/h) 0.73 sec
2002 April 8 Matt Kenseth 17 DeWalt Ford Taurus mi (km) mph (km/h) 0.888 sec

Question: What is the lowest pre-2001 UPS sponsored vehicle number at Texas Motor Speedway?