redoing my brake setup, need advice
You have a set of GM calipers in the front, which ones, metric or early calipers? >>> came with the TCI kit ,so probably metric ??
What is your master cylinder bore size?>>> 1"
What is your measured pedal ratio? >> from pivot to rod 4''. Pedal length is 16'' from pivot , so 4:1 ??
How much travel at the master cylinder pushrod do you have using the full available pedal stroke...? >> rod moves about 3/4'', might move a bit more but car won't start, so much for the new Optima battery.
What size are your rear wheel cylinders? >> not sure 80's Chev 10 bolt axle.
About pedal travel, I shortened mine, starts just on high side and passes the verical.