1970-76 Mopar A-Body 6-Gauge Black Dash Panel Kit (Classic Industries)

I'm pretty sure my original IP is the same as yours. But as an FYI, that panel can be found for $215-250ish and standard sized gauges fit in case you wanted a different style than what they offered as a package. Painless Wiring sells a gauge wiring kit, but I'm not sure if the layout fits that panel, I built my own. Also, I noticed in the notes, that is an electronic speedometer, not a mechanical one, so you'd have to buy the adapter for your trans to make it electrical which is another $100

SPEED SENSOR, MECH TO ELEC, GM & CHRYSLER, 7/8