if i get new spindles will the cougar brakes fit on my mav...i ask b/c the cougar is pretty much a mustang
If all of the other Mustang brakes fit these should too. Cougars for 1967 had a one year only, twin piston Kelsey Hayes caliper set up. If he has factory 1967 disc brakes, you need to get the proportioning valve (located at the rear of the car where the rubber flex hose is attached for the rear brakes) kind of brass cigar shaped. One other thing that you will definitely need is the little "L" shaped brackets that hold the front brake line hoses. A single bolt mounts them to the body. Obviously get the spindles, not real special (same as for Mustang/Cougar drum brakes in 1967) but they are likely not compatible with your Maverick brakes for mounting the calipers. Mavericks may or may not need a disc brake pedal? You will need to source a booster and master cylinder and brake junction block for the firewall.
If you don't use a prop valve your rear brakes can lock up to soon. The valve limits the fluid flow to the rear. You can get an adjustable one from summit racing and install it in the rear line. 1967 calipers are four piston K/H units and are prone to leaking or sticky pistons. You will need a disc brake master cylinder for manual brakes. Raybestos number MC36440. You don't want a power booster on a maverick. Hard to find and a bitch to install. If you use the cougar discs you will need the spindles as well.