you just need to plumb a remote line into the old oil pressure sender hole (above right of oil filter). then you can T off pressure and temp.
subura remote line
the thread on our hole is 1/8 BSPT (tapered), same as subaru. make sure you tell them that when you buy just in case.
or use a 1/8BSPT to 1/8NPT adaptor
also you can use the wires from the old gauges to power, supply feed etc, cant remember color codes atm, but just trace them