Late model booster/mc on 67-72

[chas350]

I have seen the newer plastic master cylinder booster combo on our 67-72 trucks, but can't remember where. I tried FAQ but only found the 73-87 booster/mc. I like the idea of a new plastic unit from the salvage yard for cheap and have seen them on our trucks.

Anyone able to help me with year/model info? Or if bracket/pushrod mods were necessary?

thanks!!

Oh, almost forgot, I am working on a 71 LWB 4wd, power brakes, disc front, drum rear so I need one from a disc/drum truck.