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I guess I could snap a pic of mine mounted in my truck. Really, the thing isn't going to spring a leak on you. Those hoses are tough. No need to mount it if you're just trying to read you cold and hot oil pressure. All the fittings you need should come with the gauge, just let the hose dangle loose under the car and leave the driver's door open if you just want to take some readings. Read it cold idle and 3000 rpms, then run at fast idle for 10 minutes or so (put you foot on the gas, read a book or something) then when everything's good and hot read idle and 3000 rpms again. Then disconnet the fitting and put the stock oil pressure sender back. Use a little teflon pipe compound on the threads ($.99 from any hardware store in plumbing section) to make a leak proof seal.
Why else mount it then?
I put one in my 91 mazda b2600 4x4 because the bearings are worn and I was getting low oil pressure lights. Until I replace the bearings the only thing that works to keep the oil pressure in a good range is redline 20W50
and the truck burns 1 qt every 150 miles You can always take the sender and the fittings in the kit with you to a hardware store and make sure they screw into the same size nut. There are only a few sizes that the auto makers use for oil pressure senders, so likely your mounting kit has the right size. Look at the threads and try to match up the diameters. If they look the same then they probably are the same. Oh, and because the block is cast iron and the gauge oil supply fitting is likely brass, if any threads get damaged by screwing in the wrong sized part it will be the brass fitting. They sell those at the hardware store too, so replacements can be had cheap.
I have to ask out of sheer curiosity why you were ever running a 20 weight oil in your SHO. That is well out of range from the recomended 5w 30.
