My excuses for declaring Saturday's results faulty. There were actually two prelims for the big bangers and the one on Saturday was indeed Heuer-Hall-Sharp.
It was the second prelim, on Sunday morning, in which Hall had his contaminated fuel problems.
Sunday's four races at Midland, September 18, 1960:
Race 5: 10 laps
1. Harry Heuer [Scarab] BM1
2. Hap Sharp [Cooper Monaco/Maserati] DM1
3. Alex Budurin [Ferrari 250TR] DM2
4. Ronnie Hissom [Lister/Chevy] CM1
Jim Hall [Maserati T61] DNF
Race 6: 20 laps
1. John Busley [OSCA] HM1
2. Ed Tucker [Elva Courier] FP1
3. Fred Chapman [Lotus 11] GM1
Race 7: 20 laps
1. Hap Sharp [Cooper/DKW] FJ1
2. Jim Hall [Lotus/Ford] FJ2
3. Steve Robinson [Volpini/Fiat] FJ3
4. Charlie Barns [Alfa Veloce] EP1
Race 8: 25 laps
1. Jim Hall [Maserati T61] DM1
2. Harry Heuer [Scarab] BM1
3. Ronnie Hissom [Lister/Chevy] CM1
4. Don Ives [Porsche RSK] FM1
5. Chuck Hall [Elva/DKW] FJ1
Dave Morgan [Corvette] BP1
Jim Barron [AC/Bristol] DP1
Alex Budurin [Ferrari 250TR] DNF
Hap Sharp [Cooper Monaco/Maserati] DNF