Anders....
You are a lucky man to have this set-up! Here are the Disc # to check your parts.
For 1967 Nova Factory DISC brake parts. Spindles-{#3902970L-3902969R} Brackets-{#1381720RH-1381721LH} {Sup.#3894482R-3894481L} Backing plates-{#1381722R-1381723L} Caliper Housing-Inner{#5468377R-{Sup.#5462029R} Inner-5468378L-{Sup.#5462028L} Outer-All {#5455534} DISC pads-{#5463191} All parts are for the 4-Piston type Caliper set up
Dave
67 Nova Boy