MSD Distributor Settings Advice Needed
 

Need help on my setting. The MSD Distributor comes with extra colored bushing and springs. From what I've heard with the engine setup I have it should be Blue bushing, 1 silver and 1 blue spring. Need opinion for best performance. My specs are below.

Vehicle: 1969 VW Beetle
Engine: 1915cc (Type 1)
Compression: 8:1
Mixture (Air/Fuel): Rich
Fuel Octane: 93
Carburetors: Dual 34 Webers
Cam: Scat #????
Ignition: MSD 6AL
RPM: Shifting @ 4,000 (Rev-limiter set @ 6,000rpm)
Coil: Blaster SS
Distributor: MSD Distributor 8485
Spark Plug Wires: MSD Wires 3193
Spark Plugs: ?????? (gap unknown)
Battery: Optima Red Top with 12v Alternator

Thanks for all the help.