ERA / Wilwood brake noise

[ERA Chas]

Bob'
The PROBLEM[S]; 1. Loud squealing noise on heavy and repeated brake application from front Wilwoods. 2. Light rotor contact of rear pads.
The SET-UP; ERA 12.18" Wilwood kit with Sierra 31YF-"soft pads" [what the box said], purchased 9/2001. Installed on chassis #112. Tilton masters already in place. Jag. rear modified ventilated rotor kit with bridged calipers from Mike Bontoft.
The STORY; Front Wilwood noise occurs during 120-30 mph applications [end of drag strip], or heavy, repeated stops to 0 mph from highway speeds. No noise during regular street or highway use. Also, it stops quite well, but seldom locks a front and NEVER locks the rear. I've inspected and found no rotor grooves, scuffs or other marks. The pads also show no blemishes. I swapped pads outboard to inboard [inverting them] on each side and applied disc brake lube to pad backs and piston edges. [thin coat] Also chamfered pad edges. Noise continues. Rotors are centered in pads as assembled by Doug, and make full contact with pad surfaces. The separate problem in the rear is that they don't appear to be doing much work. The rotors are barely scuffed and still show cross-hatch marks from machining, quite clearly. I've adjusted as much rear bias at pedal linkage, following your "washer stack" procedure, as possible.
Could each problem, though different, be caused by wrong pad compounds at each end of car? I don't know which pads Mike sent with the rear, but he told me they are "street type" pads.
HELP and THANKS.