So my issue is when doing a pull and transitioning from the throttle to the brakes it's taking a second or so to build up vacuum at the brake booster making that initial second or so very sketchy... I tried installing another check valve but saw no difference. Looking to see what other people have done or if anyone has any thoughts. Thanks

 

https://m.roadkillcustoms.com/test-power-brake-booster/

 

A vacuum pump setup will fix that.