Brake booster and master cylinder assembly
4 wheel drum cars have distribution blocks
Front disc rear drum cars after 69 have proportioning valves
4 wheel disc just use the drum brake distribution block
Early 67-69 had the add on hold off block they were not that good that is why they went to a proportioning valve in 1970. An upgrade for a 69 and earlier if original don't matter. 70-73 pictured below. Its all I use unless 4 wheel disc. Later style 74-76 are much larger and used into the mid 80's
4 wheel drum cars have distribution blocks
Front disc rear drum cars after 69 have proportioning valves
4 wheel disc just use the drum brake distribution block
Early 67-69 had the add on hold off block they were not that good that is why they went to a proportioning valve in 1970. An upgrade for a 69 and earlier if original don't matter. 70-73 pictured below. Its all I use unless 4 wheel disc. Later style 74-76 are much larger and used into the mid 80's