High Oil Pressure

[jsera]

Hey guys, I just put in new gauges on my 72 and am reading 100psi oil pressure on startup and eventually after a drive itll come down to 75. I plan on buying one of those cheap oil pressure gauges with an oil line to confirm the reading from my new gauges, but is there anything else that might be wrong? Engine is a rebuilt sbc off CL. Runs well but I have no idea what went into it. It does have an oil leak somewhere towards the rear of the engine on the drivers side. haven't figured out if its the valve covers or what