Life has become easier for those of us who love classic Mustangs. In the old days-the '70s and '80s-we were limited in what we could do with a vintage Mustang. At the mercy of salvage yards and a limited aftermarket industry, we had to improvise at every turn.
Today, companies like Master Power Brakes make short work of upgrading your braking system. You can bolt on disc brakes at all four corners. And, you can install power brakes any number of ways in '65-'66 Mustangs that were never available with power disc brakes to begin with.
One of the greatest challenges for those with '67-'70 Mustangs is installing a power booster when there's a big-block underhood. Mix in those Shelby pent-roof valve covers, and the potential for obscenities becomes great. The stock power booster is virtually impossible to remove and install with the valve covers installed; it just doesn't fit. Master Power Brakes changes all that with a compact power booster/master cylinder combination that fits like a glove-without removing the valve cover.
If originality is important, you can opt for the factory distribution blocks for 1967-'68, which also have the brake-pressure warning-light switch. The warning light comes on whenever there's a pressure loss in either the front or rear braking system. Pressure from the working side moves a pressure differential piston in the direction of the "no pressure" side, which closes the switch and illuminates the light. Whenever we correct the problem and bleed the brakes, we need to create a pressure change, which moves the piston back to center, canceling the light. The pressure change comes when we open a bleeder slowly on the unaffected side. Pressure from the affected side returns the piston to center.