Which tach adapter do I use?

[S Vicious]

Trying to use my rallye tach and a old Sun Super tach II clamped on the column.
MSD has tach adapter models 8920 and 8910 to choose from.
I use a MSD 6AL (ing.) with a Mallory Uni-Lite distributer as a(trigger) Works Great!
Anybody done this before?

(trigger)

 

[pschlosser]

Probably the #8910. The #8920 is only used for magnetic pickup.

 

[S Vicious]

Probably the #8910. The #8920 is only used for magnetic pickup.

Thank-You pschlosser! I can cover the hole in my firewall where the OSAC valve was.