Vacuum PCV delete - non return valve for brake booster

Nagasaki

Phooey
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Hi.
Have recently completed a full SAI and PCV delete and as per various instructions, connected a line straight from the rear of the rocker cover to the brake servo.
Brakes are working okay but am wondering whether I should be putting a non return valve in the line to stop boost from entering the servo?
Also belatedly released I have an additional vacuum pump to help create vacuum when under boost (apparently on autos) which I capped off but will now tee into the same line.
Anyone with experience of this?
 

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