Table:
text: 1983 IMSA GT Championship season
Schedule
Schedule
Race Length_ Class_ Circuit Date_
24 Hour Pepsi Challenge 24 Hours All Daytona International Speedway February 5 February 6
Budweiser Grand Prix of Miami 100km GTU Streets of Miami February 27
Budweiser Grand Prix of Miami 3 Hours GTP Streets of Miami February 27
Budweiser Grand Prix of Miami 100km GTO Streets of Miami February 27
Coca-Cola Classic 12 Hours of Sebring 12 Hours All Sebring International Raceway March 19
Road Atlanta Nissan / Datsun 500 500km All Road Atlanta April 10
Los Angeles Times / Datsun Grand Prix 6 Hours All Riverside International Raceway April 24

text: 1983 IMSA GT Championship season
Schedule
Schedule
Race Length_ Class_ Circuit Date_
Road America Pabst [ disambiguation needed ] 500 500 Miles All Road America August 21
Grand Prix of Pocono 500 Miles All Pocono Raceway September 11
Eastern Airlines 3 Hours of Daytona 3 Hours All Daytona International Speedway November 27

text: 1983 IMSA GT Championship season
Schedule
Schedule
Race Length_ Class_ Circuit Date_
Monterey Triple Crown 45 Minutes GTU Laguna Seca Raceway May 1
Monterey Triple Crown 100 Miles GTP/GTO Laguna Seca Raceway May 1
Charlotte Camel GT 500 500km All Charlotte Motor Speedway May 15
Coca-Cola 500 3 Hours All Lime Rock Park May 30
Lumbermen`s 6 Hours 6 Hours All Mid-Ohio Sports Car Course June 19
Paul Revere 250 250 Miles All Daytona International Speedway July 4
Pepsi Grand Prix 500km All Brainerd International Raceway July 10
Ford California Grand Prix 3 Hours All Sears Point Raceway July 24
G.I. Joe`s Grand Prix 3 Hours All Portland International Raceway July 31
Labatt`s GT 6 Hours All Mosport Park August 14

Question: What is the class of the 1983 season Budweiser Grand Prix of Miami race of the IMSA GT Championship 3 hour length?