At Spa for the 24-hour race, with the HDT running their two cars and teaming with the Roadways Commodore of Grice, and after problems including two blown head gaskets in the number 05 car (the same problem had happened when the HDT did a pre-Spa test over 24 hours at Calder Park), an early lost wheel and later a broken seat for Grice caused by his oversized co-driver, Belgian Jeweler Michel Delcourt (the Roadways team reported that the HDT refused to lend them a spare seat during the race, forcing them to borrow one from the retired TWR Rovers), and no oil pressure for the second HDT car at the end of the race, the two teams claimed the prestigious Kings Cup prize. The second HDT car, driven by New Zealanders Lowe (the team engineer and endurance co-driver for Harvey), Kent Baigent and Graeme Bowkett finished 18th outright. The Brock/Moffat/Harvey car finished 22nd while Grice, Delcourt and Belgian Alex Guyaux finished 23rd.