The sender should be to the right of the distributer, under the intake manifold. Or at least it is on my 84 chevette td. It is tucked in and difficult to see.
You need to read my thread under chevy/ford kits about oil pressure gauge problems. The stock Chevy sender you buy at local parts stores will not work with the Classic Instrument gauge!!
BTW, anyone need a couple of new stock Ford sending units?