I have designed this T6 aluminum master cylinder rotator/adapter to allow you to clock the hydroboost on your firewall mount 90 for greater clearance and this positioning places all the hose ports/fittings away from the engine.
AP Racing CP7855-90 Master Cylinder With Spherical Bearing Mount - 0.625 (5/8) "
68-74 GTO Chevy Nova Pontiac HydroBoost Power Brake Wilwood Master Cylinder
DORMAN 42035 Master Cylinder Cap 25530879, 25602887 Buick/OLDS 90-87,Cad 90-87
Brake Master Cylinder Cylinder Maestro Land Rover Defender 90 2.5 D Td STOP S138241
New Dorman M39980 Brake Master Cylinder fits 90-95 Jeep Wrangler 5252626 Non ABS
Universal 90 Degree Under Dash Power Brake Pedal w/ Booster Master Cylinder Kit