how to wire an ignition kill switch

[howdiy]

my setup:
454 with around 9.6 CR
ported large oval heads + 2.19/1.88 valves
performer RPM intake manifold
Pro systems 950HP carb
long tube headers and 3" duals
MSD 6AL-2 Programmable unit with locked-out HEI
initial advance is 40
max advance @ 3500 RPM = 32
start advance = 15 ( 25 degrees of start retard )

this box works by retarding from the total amount (initial advance)

Ahmed

What cam?

 

[GMC500]

What cam?

Lunati 60203
Hydraulic flat tappet
Basic Operating RPM Range 1,800-6,200
Duration at 0.50" Lift 227 int./233 exh.
Advertised Duration 268 int./276 exh.
Valve Lift 0.542 int./0.554 exh.
Lobe Separation (degrees) 110