 He would later qualify his car in the top 10 at the 1989 Tooheys 1000 and partnering Paul Radisich would finish the race in ninth position.In the 1990 the cost of running the expensive European based Sierra's forced Brock to join forces with Andrew Miedecke (whose own Sierra, like Brock's, had links to British Sierra expert Rouse), leaving Jones without a drive.From 1990–1994 he was then called upon to drive for the Factory Holden Racing Team in the endurance races.