Confused... really need help

I finally put on my MSD 6AL ignition and I had to extend all the wires because I mounted it in the car.... I also put on a new battery and cables.... Ever since... I have been getting higher than usual oil pressure.. it use to be around the top of the A (NORMAL) Now it is around the O I did unplug the wire to the sending unit but I put it back on after I hooked up the ground to my timing cover from my battery... also my water temperature is flucuating more now, I do have underdrive pullies, but it is more touchy and sometimes gets around the O (NORMAL) I am lost, this has just started to happen today after the install of those things. What the hell is going on???
 
do you still have the stock gauge voltage regulator?
the different readings could be from removing and reinstallation of the sending wires (cleans them up) or from the box. i dont know about the box issues, so i wont comment.

good luck.