confused on these brakes

9" brakes in 1965 don't use push rods with the wheel cylinders like the 10" brakes do. The shoe pushes right against the flat surfaced wheel cylinder piston. The 10" wheel cylinders have a cupped piston where the push rod rests. If you're using a much later brake setup on your '65 (which it appears you have), you need to use all the later brake related parts, from shoes to hardware to self adjusters. Order parts for a '71 model if you want to use that later (and better) system. The drums will work, but, everything else is different to where you can't mix and match.