Rear Discs locking up? 914 proportioning valve?
 

My GLer is long term project car. Question has anyone running brembo 4 piston calipers up front and brembo 2 piston calipers in rear (my Set-up 91 Porsche Carrera C2, heh heh) or similar combo run into any plroblems with rhe rear locking up? I aquired the 914 rear proportioning valve as a preventative measure to this potential problem. Any comments on this would be welcome.
Wolfy