1969 Barracuda Fastback
The final check on the brake pushrod is that there should be a very small clearance with the recess in the rear of the Master Cylinder piston. Have someone lightly start to press on the brake pedal while looking in the MC through the small holes in the bottom. There should be a small delay before the piston starts moving. If piston starts moving right away, then pushrod is too long.
Jim