Yes, it would be accurate as the pressure in that elaborate "manifold" would be identical the the pressure at the point in the block where it was tapped......
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!