Will S/W gauges work with stock sending units?

Doesn't it depend on the resistance the gauges are designed for and the resistance the sending units produce ? It not universal.
Yep! Sometimes a manufacturer will spec an ohm resistance for there gauge. It doesn’t make sense to us but for them, you have to purchase there material so they make the money of everything. This way you just can’t run out and grab a generic or manufactures sending unit and be back up and running in a jiff.

I thinks it’s bullshit but that’s how it is. Crappy, I know.