Tach adaptor question:

Okay so I've recently installed a mallory hyfire VI-AL igniton box and a sunpro super tach 2 and the tach is not working. I'm assuming I'll be needing a tach adapter to get it to work right (all connections are good) but I see on summit racing there is a $30 adapter and a $110 adapter...what the difference and what should I use?

I think you need the expensive one for electronic ignition with a magnetic trigger and the cheaper one for points. If you need the expensive one you can use the MSD 8920 tach adapter which is around $50 with free shipping on amazon. I'm using the msd adapter with a hyfire VI-A with no problems.

Yeah I am using the oem electronic distributor so that means I'll have to go with the more expensive one correct?

get a better tach... that Sun is more than likely 1000 RPM off anyway..