Thanks Jeff for the prop valve mention.
I took a closer look also at the MC I had bought on amazon and although it was correct for a 1972 C10 it didnt have a primary cylinder that was larger than the secondary that a front disc and rear drum setup should have, So I did order a new MC that better matched what I needed here..
https://www.summitracing.com/parts/DHB-M76162
and Prop valve here with the bracket
https://www.summitracing.com/parts/RSD-PVK71
Looking to get these installed soon after I get the lines figured out more. I will use 1/4 inch lines of the nickel/copper line on the front(primary) and I think that 3/16 may be best to run to the drums (secondary) but I will call inline tube and the other brake company "the right stuff" and see if they can tell me given my set up which size line is best to run. Also had a question about the coiling design of the lines that I see on alot of the MC to prop valve photos on others trucks. Not sure if thats a must if using a bracket or not.
Also thanks for the vote on the nickel copper, Im going to try tonight and tomorrow and see how it goes.