Paul, one wire from ignition. If you want to run a tach there is a second (labeled) terminal on the distributor. The directions with the unit are in American but lack a diagram or much detail. Guess they figure if your ordering it you know how to install it. You can get a wire set from any FLAPS or search Amazon for 6 cylinder HEI plug wires. I found red ones to match the cap. 🛠

Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)