Aftermarket Dash & Gauges Help

That can be a can of worms. :D
Senders, compatibility of the two types, adapters and connections.

I run mechanicals for oil pressure and temp, and a simple volt meter along with a tach, Air/fuel ratio and aftermarket fuel gauge, flip down from the roof Kindle fire touch screen tied into the stereo and wireless internet.

Point is, there are more than a few of us that can help when we know the specifics of the application and changes you want to make and with what.