Pump is on the side of the block behind the flywheel housing.
You might consider getting a workshop manual. For instance, use SEARCH for "Haynes" on this site.

It looks like both gauges are electrical. Wheres the oil pump on these engines? They could not be more different than the big blocks im used to. This one has an su carb not MEMS MPI if that helps with anything.

What type of oil temp gauge is it, mechanical or electrical? Where is it mounted?
What type of coolant temp gauge is it, mechanical or electrical? Where is it mounted?

I have found that coolant warms up first(as expected), but after a period of constant driving, the oil temp and coolant temp start to approach one another.

"Some" parts on the car are from an 88 if that helps. Ill try and get a hold of an laser thermometer and see whats up.

Before you start spending money of fixes, make sure your gauge is calibrated. 

Put a piece of black electrical tape on the oil filter.  Then, with the engine at temperature use an infrared thermometer to measure the oil temp by aiming it at the tape. 

When pushed hard the MPi engine will reach 120 C or 248 F, but cool quickly when stress is removed. All without an oil cooler.
Terry

140c= 284 f. I'm wondering if that's possible.  Check the gauge.  Above 270, the oil breaks down rapidly. Is it piss thin?

My wife and I just cruised in two Travellers approximately 1800 miles over the course of a week to get to MMW 2018.
We regularly ran at 65-70 mph with occasional bursts faster than that. Oil temps were mostly in the 90s centigrade, maybe climbing to 100 on grades.

I am suspecting that if your car has an electric oil temp gauge, it is a bit newer than 1970, I would verify that the gauge is accurate before making any other assumptions.
Terry

My moms 1970 rover mini with a a+ 1250 engine is having some issues again the most concerning of which is the oil temp gauge maxing out at 140+c° on the highway. The coolant temp seems to be normal if a little warm but thats to be expected running at 4000 rpm on the highway. Does this mean we need an oil cooler or is this somehow normal. I know these cars arent designed for highway cruising but the fact that nothing was smoking and the coolant temp was normal leads me to believe something is up. Any ideas on whats happening here? Thanks.