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.^[1] 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.^[2]

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
8 DNF	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
13 DNF	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
28 DNF	GTO	07	Morrison's Inc.	Dave Cowart Nick Craw Joe Castellano	Porsche 911 Carrera RSR	165
29 DNF	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
32 DNF	GTU	51	Wynn's International	John Hotchkis Robert Kirby Dennis Aase	Porsche 911S	142
33 DNF	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
35 DNF	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
38 DNF	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
40 DNF	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
44 DNF	GTU	34	Drolsom Racing Inc.	George Drolsom Hugh Davenport	Porsche 911S	98
45 DNF	GTU	84	Worldparts	Bob Speakman John Maffucci	Datsun 260Z	98
46 DNF	AC	47	Tim Chitwood	Tim Chitwood Sam Fillingham K. P. Jones	Chevrolet Nova	90
47 DNF	GTO	87	Pedro Vazquez	Pedro Vazqez Ron Oyler	Porsche 911S	83
48 DNF	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
50 DNF	GTX	24	Executive Industries	Tom Frank Bob Bergstrom	Porsche 911 Carrera RSR	77
51 DNF	GTO	46	Mauricio de Narváez	Mauricio de Narváez Albert Naon	Porsche 911 Carrera RSR	76
52 DNF	GTU	27	Miami Auto Racing	Ray Mummery Jack Refenning Tom Sheehy	Porsche 911S	70
53 DNF	AC	0	Chesrown Olds	Gene Rutherford Tom Wallace Kathy Wallace	Oldsmobile Cutlass	66
54 DNF	GTX	3	Bill Freeman Racing	Bill Freeman Bob Harmon Byron Leydecker	Porsche 911 Carrera RSR	62
55 DNF	GTX	73	Howey Farms	Clark Howey Dale Koch	Chevrolet Camaro	50
56 DNF	GTO	4	B. R. Racing Team	Mark Leuzinger Mike Van der Werff	De Tomaso Pantera	48
57 DNF	GTX	6	Dick Barbour Performance	Dick Barbour Rolf Stommelen Manfred Schurti	Porsche 935-77A	47
58 DNF	GTX	11	Javier Garcia	Javier Garcia	Chevrolet Corvette	46
59 DNF	GTX	41	Jones Ind. Racing	Herb Jones Jr. Steve Faul	Chevrolet Camaro	45
60 DNF	GTU	76	Quality Inn	Frank Thomas Lee Mueller Paul May	Porsche 911	43
61 DNF	GTU	19	Hallet Motor Racing Circuit	Anatoly Arutnoff Brian Goellnicht Jose Marina	Lancia Stratos HF	34
62 DNF	GTX	8	Robert Beasley	Bob Beasley Bruce Jennings	Porsche 911 Carrera RSR	30
63 DNF	GTU	45	Vann's Auto Body	Gary Steele Jim Gaeta Bob Zulkowski	Porsche 911	28
64 DNF	GTO	20	Bostyan Racing	Richard Bostyan Jerry Thompson Don Yenko	Chevrolet Corvette	26
65 DNF	GTO	30	Aro-Mandy Racing	Mandy Gonzalez Hiram Cruz Manuel Villa	BMW 3.0 CSL	25
66 DNF	AC	80	Herb Adams	Herb Adams Pat Bedard Marv Thomson	Oldsmobile Cutlass	21
67 DNF	GTX	86	Team Pantera	Hugh Kleinpeter Jef Stevens	De Tomaso Pantera	17
68 DNF	GTO	04	Rick Thompkins	Rick Thompkins Randy Blessing	Chevrolet Corvette	15
69 DNF	GTX	59	Brumos Porsche	Peter Gregg Brad Frisselle	Porsche 935	11
70 DNF	GTO	23	Overbagh Motor Racing	Hoyt Overbagh Billy Hagan Bud Wamsley	Chevrolet Monza	8
71 DNF	GTU	78	Abingdon/Ashley Motors	Rod Bremner Don McKnight	Triumph TR7	7
72 DNF	GTU	49	Ted Schumacher Racing	Ted Schumacher Robert Hubbard John Kelly	Triumph GT6	7
73 DNF	GTX	7	Heimrath Racing	Ludwig Heimrath Sr. Norm Ridgley	Porsche 935	6
74 DNF	GTX	40	Quintana Racing	Manuel Quintana Richard Stone	Ford Mustang	5
75 DNF	GTX	1	Dale Kreider Racing	Dale Kreider Jack Baldwin	Chevrolet Corvette	4
76 DNF	GTX	54	Raul Garcia	Joaquin Lopez Raul Garcia	Chevrolet Camaro	2