Ive got an 83 rx7 that has a 12a motor from a 79 in it im trying to figure out how to get my oil pressure and water temp guages to work sense idk where i can connect them at. Ive tried searching but am not coming up with anything that solves my problem

 

If the rear iron does not have the openings for the oil pressure and water temp then there is limited ways to do this. You can get a oil pedestal block to put under the beehive that will allow for oil temp/pressure. As for water temp, there are a couple of options. If you can get an old school water thermastat neck, it can be drilled and tapped for a water temp sending unit. You could also get one of those upper rad hose adapters that allow a sending unit.

It's your choice if you want to use factory sending units/wiring or after market gauges.