[AZKen]

Don't think Factory 63 tach will work with HEI. You have converted to non voltage regulator/original ignition I suppose. Also most 63's have tell tale (idiot lights) for Gen and oil. Therefore senders are different for tell tale than for gauges. If you mean Amp gauge when you say battery gauge, follow wiring diagram for a amp gauge. Usually one to batt, one to alt. Not sure what you mean by "battery gauge". Voltage and AMP gauges hook up differently.
It's funny, when you say old gauges to an old guy it don't mean VDO. I was thinking same a Funky61, Stewart Warner. Also don't worry about colors, wire per function of the wire. How many actual original analog dial gauges in the instrument cluster? Be aware that PO's add gauges in the panel.