I looked at a couple of my old cars, Trans Ams & a 69 El Camino, they all have the larger chamber which is the front, going to the front brakes. Of course they also have proportioning valves. I thought since both chambers are the same size on the Vette cylinder, it wouldn't make any difference. That's why I put the adjustable valve on the rear. Another thing I may have screwed up is putting big lines on the front and small on the rear, would that be backwards? I was thinking that the calipers needed more fluid. If you still think I need to swap the chambers, I'll try that this weekend.
