The joke is on the guys at the FLAPS! The gauge Cosmo is referring to is simply an aftermarket mechanical gauge- - - -I'll bet they have one right on the shelf! Just disconnect the line going to the dash from the T fitting on the side of the block, plumb in a new gauge line temporarily, duct tape the gauge to the windshield wiper, and go for a test drive. Then check to see if the pressure reading is the same with the new gauge!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!