I run single piston sliding calipers both front and rear.
Very interesting; my experience is that switching from steel to aluminium calipers makes pedal more spongy. At least some of the Wilwood- types. And SSBC are aluminium aswell, as I recall?
Maybe it's 1 piston/ sliding VS multi piston/ double row calipers?
OK; on the
bleeding- I did them both at one time. There's a seperate reservoir for each of the pumps. I could try one more time just to be shure..... (The pumps are not easily accessible, so not a funny job!)
Will post again after bleeding or even changin the rear MC.
Thanks
RS