RZ, most aftermarket
oil pans have an extra bung for an
Oil Temp sender.
Depending on how your fan is wired, you may need to drill and tap an additional pipe thread in the water crossover to accomodate water temp gauge sender, and fan temp sender.
You can also install one fuse at a time to test one circuit at a time. Have your VOM and some jumpers handy just in case you have to check something out.