This screw allows adjustment of the vacuum secondary. If adjusted correctly, it will open smoothly without any surge or lag in power delivery.
Here is the finished product, from a useless paperweight to an affordable and totally adjustable performance in a few short hours.
Part Numbers:
Performance kit non-stick gaskets (# 3-200)
Primary metering block (# 34-
Secondary metering block (#34-66)
Adjustable vacuum secondary solenoid (# 63-1)
