Team McLaren,1968 7 litre Chevy alloy LT1 ‘Rat Motor’. 4.25 inch standard bore and 3.76 inch stroke with Moldex steel crank, Cloyes roller timing chains, cam by Vince Piggins group at Chev R&D. Production solid lifters, Forgedtrue pistons and Carillo rods. Dry sump pumps by Weaver and magnesium dry sump pans by Chev R&D. The L88 heads had 2.19/1.84 inch intake/exhaust valves with the ports enlarged and re-shaped. Crane aluminium roller-rockers. Magnesium intake manifolds had a 2.9 inch bore for each cylinder with a fuel injector into each of the curved and tuned length steel velocity stacks. Intakes were modified Crower with MacKay making the intakes, Lucas metering unit, Vetex magneto and tach drives from magnesium. That lot generated a real 650 bhp @ 7600 rpm with McLaren quoting 620 in-period . In ’68 the M8A won 4 of the 6 rounds and Denny the title. McLarens won every round of the series
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