Brock’s true Bluey
rods, heavier L34 valve springs, Crane roller rockers, a lumpy Crane camshaft, Rochester four-barrel carb, matched inlet and exhaust ports, double-row timing chain, lightened flywheel, HM headers and Lukey mufflers.
All up it produced 196kW at 5200 revs and 418Nm at 3600 revs, an increase of 19kW over the regular Holden V8 with equal torque.
Backing up to the new engine was a stock Holden M21 four-speed manual gearbox.
Tested at the time, the VK Group A would reach 100km/h in about seven seconds and cover the standing 400m sprint in 15sec.
Under the Group A rules Holden had to produce 500 cars before it could race it. These were built on the Holden production line and shipped to Brock’s factory in Port Melbourne for completion.
Though the current financial crisis has caused classic-car prices to soften, the Brock cars are holding up reasonably well and should steadily increase in value.
Speculators are advertising cars for $150,000, but look for a deal in the $80,000-$100,000 range. UNDER the Brock skin is a Holden Commodore that is subject to the same afflictions seen in regular Commodores. Look under the bonnet for oil leaks around the engine and power steering.
Inside, look for wear on the light blue trim — it doesn’t wear well. Check the dash pad for cracks and distortions from sun exposure.
And make sure it’s a genuine Group A model and not a fake. body strength and crumple zones in a crash. Drivers had to rely on seat belts.
But for its time the VK Group A did have quite good active safety with its responsive handling and good-sized disc brakes. WITH a highly tuned V8 under the bonnet the VK Group A is never going to be a fuel miser, but fuel economy is something few of its owners would care about.
The VK Group A is a sunny Sunday car — it’s not likely to be driven daily — so fuel consumption is not much of a concern to those who own one.
It requires a high-octane fuel. Unless it has been modified for unleaded, will also need an additive.
Expect to see fuel-use figures of 15-17 litres/100km, but it depends on driving style.