Proportioning valve or no for 65 Dart disc/drum brake conversion.

Yes they did. I don't where you got your info. It's incorrect.

I thought I read that proportioning valves were in later a bodies.

So I will need the distribution block and the proportioning valve or does the valve replace the block?

I won’t be doing the conversion, I’m taking it to a shop but I want to correctly source all parts to make sure that the Dart doesn’t sit there taking space waiting for a part I didn’t order.