my 260 has a zx distributor in it, i was wondering what to set the ignition timing on with swapped distributor. Also is it possible to connect my factory tach. I have a arizona z car 4 barrel intake with a holley, and headers what would be the best tuning for my car.

 

I can't answer you on the timing, but the factory tech will work.

 

I'm running AZ4BBL and headers on a 280. Mine seems to like it around 18 BTDC