your take on BOV's and WG's

My take on wastegates and blow-off valves are minimal.
Size Accordingly so they arent restrictions.

Slant 6 dual 38's or (1) 44mm
Single Turbo SB V8.....would require Dual 38's or (1) 50mm.
Single Turbo BB V8 Dual 44s....or Single 70mm

Blow Off valve....needs to be 1/3 the diameter of the charge piping...3" charge piping could get away with a 30mm BOV....but 4" pipe would NEED a 50mm.

WG and BOV are only a small part of a SYSTEM.