Oil pressure gauge and idiot light

[ratman90]

72 C10 does not have oil pressure gauge hooked up.
Not sure if I can, but would like the mechanical gauge and the light to both work.
Has HEI, and from what I read here, that prohibits the tee connection for the 2 in one.

Can I do the mechanical from the back of intake and the idiot light from over by the old filter on this 350?

Where do I send the wire to from the sensor for the light?

Thanks
Larry