Fitting to run mechanical temperature gauge and dash light?

[RPOLS3]

Trying to install a period correct mechanical S-W temperature gauge and still run the factory temp lights in the dash in a 62 409-409. As far as I can tell the temp sender location at the front of the factory 881 2x4 manifold is the only location to install a temperature sensor. Any suggestions to be able to do this or do I have to give up the dash lights in order to run the gauge?

Thanks