crazy gauges

those are just regular mopar gauge issues
in order to fix them, grounds have to be checked. check to make sure you have good grounds at:

batt to frame,
batt to block,
block to frame..

like mike said you can never have enough

your oil press gauge is prolli grounding out when you turn
your sender has prolli started on its way out
Your amp gauge is a current gauge, showing you the flow of amps, have you added anything to your car or your system that would have added an aditional draw on the alt.? how do you know that its charging fully?

Its of my knowledge that all mopars run a little under the middle line. add something like lights and it goes under a little more.. step on the gas and it will go back up to normal. a guage doesnt go faulty, its just an in line gauge that has nothing to break or lead to wrong readings.
i suggest you disconnect the AMP gauge and install a Volt gauge

http://www.madelectrical.com/electricaltech/amp-gauges.shtml

ever since i was recommended this i have seen great improvement in my electrical. ( i run a large stereo system )
or just check that the connections on the back of the amp gauge are nice and tight.

Sorry for the long winded suggestion, but its better to be safe then sorry.

:coffee2:
Cerwin