The Twelve Hours of Sebring International Grand Prix of Endurance for the Camel GT Challenge was the second round of the 1978 IMSA GT Championship. The race was held at the Sebring International Raceway on March 18, 1978. The overall victory went to No. 9, Dick Barbour Racing (Porsche 935). The drivers were Brian Redman, Charles Mendez and Bob Garretson.

Race results Class winners in bold.

Pos Class No Team Drivers Car Laps 1 GTX 9 Dick Barbour Racing Brian Redman Charles Mendez Bob Garretson Porsche 935 240 2 GTX 95 Bob Hagestad Bob Hagestad Hurley Haywood Porsche 935 240 3 GTX 13 Ore House - Vail Hal Shaw Jr. Tom Spalding Porsche 935 239 4 GTO 33 JLP Racing John Paul Bonky Fernandez Porsche 911 Carrera RSR 233 5 GTX 32 Earle & Akin Racing Steve Earle Bob Akin Rick Knoop Porsche 911 Carrera RSR 225 6 GTU 77 Bill Scott Racing Francisco Romero Ernesto Soto Porsche 911S 219 7 GTU 42 El Sol Racing Chiqui Soldevilla Luis Gordillo Porsche 911S 213 8DNF GTO 25 KWM Racing Kenper Miller Walt Bohren BMW 3.5 CSL 211 9 AC 96 Unicure Gene Felton Vince Gimondo Buick Skylark 209 10 GTU 62 William J. Koll Bill Koll David Hamren Dennis Sherman Porsche 914-6 GT 209 11 GTO 03 Cliff Gottlob Cliff Gottlob Danny Terrill Chevrolet Corvette 199 12 GTU 99 Bob Bondurant Steve Cook Bill Cooper Ron Southern Datsun 260Z 198 13DNF GTO 58 Diego Febles Racing Diego Febles Alec Poole Porsche 911 Carrera RSR 197 14 GTO 57 Sebring Racing Terry Keller Bob Gray Nort Northam Chevrolet Corvette 197 15 GTU 36 Case Racing Ron Case Dave Panaccione Jack Rynerson Porsche 911 196 16 GTU 50 Fritz Hochreuter Fritz Hochreuter Rudy Bartling Rainer Brezinka Porsche 911S 189 17 GTO 48 Autodyne Luis Sereix Lyn St. James Phil Currin Chevrolet Corvette 186 18 GTU 01 Roehrig Racing Dave White J. Dana Roehrig Gary Mesnick Porsche 911S 185 19 AC 92 Road Atlanta Dave Sloyer Jim Fitzgerald Plymouth Volare 184 20 GTO 79 Rennsport Porsche Works Michael Callas Peter Papke Jim Cook Porsche 911 Carrera RSR 182 21 GTU 89 Barrick Motor Racing Rusty Bond Ren Tilton Porsche 911 181 22 GTX 05 Saltwater Band Stephen Bond Philip Dann Chevrolet Monza 181 23 GTU 85 John Hulen John Hulen Ron Coupland Nick Engels Porsche 914-6 GT 174 24 GTX 93 Whittington Bros. Don Whittington Russ Boy Porsche 934/5 172 25 GTU 70 Race Car Ent. M. L. Speer Windle Turley Porsche 911S 168 26 GTU 71 Foreign Exchange Racing John Higgins Tim Cooper James King Porsche 911 168 27 GTU 88 Hamilton House Racing Joseph Hamilton Chuck Wade Ron Collins Porsche 911S 167 28DNF GTO 07 Morrison's Inc. Dave Cowart Nick Craw Joe Castellano Porsche 911 Carrera RSR 165 29DNF GTU 00 Red Roof Inns Steve Southard Jim Trueman Porsche 914-6 GT 164 30 GTU 52 Native Tan Charles Kleinschmidt Lee Culpepper William Koch MGB GT 160 31 GTU 21 DiLella Racing Vince DiLella Manuel Cueto Porsche 914 152 32DNF GTU 51 Wynn's International John Hotchkis Robert Kirby Dennis Aase Porsche 911S 142 33DNF GTO 14 Robert LaMay Robert LaMay Richard Valentine Larry Parker Ford Mustang 140 34 GTO 91 Framm Promotions / W. Frank Werner Frank Roger Schramm Porsche 911 Carrera RSR 140 35DNF GTU 08 Terry Wolters Terry Wolters Wayne Miller Porsche 911 Carrera RSR 129 36 GTU 35 Team Beilcke Bruno Beilcke Sepp Grinbold Alf Gebhardt BMW 2002 123 37 GTO 12 George Garcia George Garcia Daniel Vilarchao Chevrolet Corvette 122 38DNF GTX 2 McLaren North America David Hobbs Milt Minter Tom Klausler BMW 320i Turbo 119 39 GTU 61 Faza Squadra Al Cosentino Jim Downing Mazda RX-3 116 40DNF GTX 09 Belcher Racing Gary Belcher Doc Bundy Porsche 934/5 115 41 GTX 38 Meldeau Tire Co. Mike Meldeau Bill McDill Chevrolet Camaro 113 42 GTX 17 Kenneth LaGrow Kenneth LaGrow Jimmy Tumbleston Chevrolet Camaro 112 43 GTU 02 H. David Redszus H. David Redszus Merv Rosen BMW 2002 111 44DNF GTU 34 Drolsom Racing Inc. George Drolsom Hugh Davenport Porsche 911S 98 45DNF GTU 84 Worldparts Bob Speakman John Maffucci Datsun 260Z 98 46DNF AC 47 Tim Chitwood Tim Chitwood Sam Fillingham K. P. Jones Chevrolet Nova 90 47DNF GTO 87 Pedro Vazquez Pedro Vazqez Ron Oyler Porsche 911S 83 48DNF GTX 06 R. V. Shulnburg Scrap Metal R. V. Shulnburg Dave Heinz Michael Keyser Chevrolet Corvette 83 49 GTX 28 Desperado Racing Clif Kearns Marty Hinze Stephen Behr Porsche 935 79 50DNF GTX 24 Executive Industries Tom Frank Bob Bergstrom Porsche 911 Carrera RSR 77 51DNF GTO 46 Mauricio de Narváez Mauricio de Narváez Albert Naon Porsche 911 Carrera RSR 76 52DNF GTU 27 Miami Auto Racing Ray Mummery Jack Refenning Tom Sheehy Porsche 911S 70 53DNF AC 0 Chesrown Olds Gene Rutherford Tom Wallace Kathy Wallace Oldsmobile Cutlass 66 54DNF GTX 3 Bill Freeman Racing Bill Freeman Bob Harmon Byron Leydecker Porsche 911 Carrera RSR 62 55DNF GTX 73 Howey Farms Clark Howey Dale Koch Chevrolet Camaro 50 56DNF GTO 4 B. R. Racing Team Mark Leuzinger Mike Van der Werff De Tomaso Pantera 48 57DNF GTX 6 Dick Barbour Performance Dick Barbour Rolf Stommelen Manfred Schurti Porsche 935-77A 47 58DNF GTX 11 Javier Garcia Javier Garcia Chevrolet Corvette 46 59DNF GTX 41 Jones Ind. Racing Herb Jones Jr. Steve Faul Chevrolet Camaro 45 60DNF GTU 76 Quality Inn Frank Thomas Lee Mueller Paul May Porsche 911 43 61DNF GTU 19 Hallet Motor Racing Circuit Anatoly Arutnoff Brian Goellnicht Jose Marina Lancia Stratos HF 34 62DNF GTX 8 Robert Beasley Bob Beasley Bruce Jennings Porsche 911 Carrera RSR 30 63DNF GTU 45 Vann's Auto Body Gary Steele Jim Gaeta Bob Zulkowski Porsche 911 28 64DNF GTO 20 Bostyan Racing Richard Bostyan Jerry Thompson Don Yenko Chevrolet Corvette 26 65DNF GTO 30 Aro-Mandy Racing Mandy Gonzalez Hiram Cruz Manuel Villa BMW 3.0 CSL 25 66DNF AC 80 Herb Adams Herb Adams Pat Bedard Marv Thomson Oldsmobile Cutlass 21 67DNF GTX 86 Team Pantera Hugh Kleinpeter Jef Stevens De Tomaso Pantera 17 68DNF GTO 04 Rick Thompkins Rick Thompkins Randy Blessing Chevrolet Corvette 15 69DNF GTX 59 Brumos Porsche Peter Gregg Brad Frisselle Porsche 935 11 70DNF GTO 23 Overbagh Motor Racing Hoyt Overbagh Billy Hagan Bud Wamsley Chevrolet Monza 8 71DNF GTU 78 Abingdon/Ashley Motors Rod Bremner Don McKnight Triumph TR7 7 72DNF GTU 49 Ted Schumacher Racing Ted Schumacher Robert Hubbard John Kelly Triumph GT6 7 73DNF GTX 7 Heimrath Racing Ludwig Heimrath Sr. Norm Ridgley Porsche 935 6 74DNF GTX 40 Quintana Racing Manuel Quintana Richard Stone Ford Mustang 5 75DNF GTX 1 Dale Kreider Racing Dale Kreider Jack Baldwin Chevrolet Corvette 4 76DNF GTX 54 Raul Garcia Joaquin Lopez Raul Garcia Chevrolet Camaro 2

Class Winners

Class Winners GTX Redman / Mendez / Garretson Porsche 935 GTO Paul / Fernandez Porsche 911 Carrera RSR GTU Romero / Soto Porsche 911 AC Felton / Gimondo Buick Skylark

References