Today I was driving and floored it to pass a car and noticed the gauge spiked to 25psi then after a couple seconds dropped to 21-20psi and stayed there? The only thing I could think of was the pre spool fuel load hitting causing boost to spike then go down? Or maybe my govenor arm needs adjusted?

 

try changing the fuel filter!!! Mine did the same thing.
Does it have sorta a popping/missing sound?

 

No the engine runs smooth, The filter was changed less than 3k miles ago.

 

I would say you are on the right track with the governer arm. Sounds like it might be just a bit high. Move it down just below the tip of the J hook. Should be able to bring the boost up to about 32- 34 psi