need engine guru advise.....high oil psi

[Old Guy with 87 GT]

interesting debate.......i took the stang out yesterday,kept a sharp eye on the pressure .......still keeping it's pressure at around 50psi ,i did notice it it fluctuated a little bit more after driving it a while (hot engine).....it was going between 40psi at hot idle to 55psi at high rpm .........i still think somthings not right ,before it would fluctuate alot more .......
intill i hooked up mechanical gauge i didn't have anything to varify dash gauge ......although the dash gauge is not as fast, it still works.....according to the dash gauge ,before the condition started it would peak around 65-70-psi and drop to around 20 psi..........i won't know for sure whats wrong till i tear it apart .....

i'll keep you guy's updated.....i just got my w-2 so when i get tax money i plan on disecting the moter anyway.......

i'll probly take it out to play tonight for one last time then park it and start tearing it down.......i figuer if it has pressure then it isn't hurting the vitals of the moter......then as long as i don't go on any long trips i'll be allright ........if somthings blows i'll just tow it home ......i probly put like a 100 miles on it yesterday and it wasn't making noises,running hot or getting worse .........

my main concern was the vital parts of the moter.......ie distributer ,crank,valves,heads, cam.......i appreciate the advise and help and i'll probly have some more questions in the near future......i want to tear down moter before i make any solid plans on what to build ,but i know i'll have combo questions when i do

well thanks .........................james