Another front brake upgrade question

I am going to upgrade the front brakes on my 78 to the 11 inch rotors. Instead of a big layout of money for a full kit, I need to break it up over time buying components one at a time. I have found rotors and brackets, my question is what calipers and brake lines would I need to get. I know GM metric, but off of what year, make, and model?

Thanks in advance, Tom