Re: Changed front pads now no brakes on front
I guess I'd first verify that there are no issues with the flexible hoses to your calipers. If the hoses are cracked on the outside, then obviously they should be replaced. It is possible for the hoses to deterioriate on the inside where you cannot see it, but look perfectly fine on the outside. Interior deterioration can actually cause that hose to act as a check valve inhibiting the ability to properly bleed the brakes. Same holds true for the rear hose from the diff to the hard line on the body. I don't know that this is a contributor to your problem, but wanted to mention it. New hoses are cheap insurance.
I still think you need to bench bleed the MC again to make sure all the air is out. It doesn't take much air to give you a poor pedal. Your test suggests that you are not getting any leakage around the piston in the MC, but like I said in my earlier post, watch for leakage up where the push rod enters the MC under the dash. When you bench bleed the MC give it some time between each stroke and keep it up until you get zero bubbles.
I use a Motive power bleeder that works on a pump up tank like a garden sprayer. Since I started using one of those years ago, even if I have a bunch of air in the line it blows out quickly and fluid follows soon thereafter, but I do remember the periodic frustration of manual bleeding using the old foot on the pedal method. My wife did not like that method one bit.
'69 Z/28, Lemans Blue/White Stripes, DZ302, Tremec Magnum, 4.10, Procar Elite Seats,
Custom Upholstery, Dynatech headers, 17" VWW V45's, 235/45, 275/40, C5 Front Brakes