i have original rally gauges in my 69, at first the oil and temp gauges worked fine, the fuel always went way past full and stayed there. i ran it out of gas one day and the fuel gauge started working. now after redoing the interior,(removed dash for paint etc). the temp still works but the oil pres. pegs past high as does the fuel. i just checked the dash ground and added a jumper from the engine to firewall and replaced the crimp at the sender in the tank. am i missing something?how do i check the oil pressure sender? any ideas?

The best guess would be the printed circuit went bad when you had the dash out. Unplugging and plugging back in the dash harness from the back of the cluster could have been enough to ruin an aged printed circuit. One other thing, fumes from lacquer thinner can ruin an aged printed circuit also.
For a test, you could test the oil pressure sender for the correct resistance. I don't have the exact readings you should get when testing. Someone may chime in to give you those details... Since this happened after you pulled the dash, checking the sending unit would just be a formality because it would have to be a coincidence that it went out in this course of events.

thanks for the info, know where i can get a new printed circuit?

You're welcome. Ames 1-800-421-2637

anything i can check before i take it apart again? i dont know why i'm hesitating, it is a ton of fun!!

I would check and make sure your ground is good again first. There are too many gauges screwing up to be a circuit board issue. If it were one gauge, perhaps a board. Since it is many, and your fuel sending unit/gauge is screwy, I would check ground. Those printed circuit boards are $130 and not returnable.

Maybe buy a goo set on Ebay or here for $25 first.

It's always good to check.... And the circuit is $80. One thing that all those problems have in common is the printed circuit... Always good to double check though.

ok guys, thanks for your help. i will recheck the grounds. any idea where i could be missing one, i have a jumper from batt to core support, one from engine to firewall, dont know if there are any more. i'll run a long temporary one from the gauge grnd strap to the batt. if you think that will help. thanks again, mark

Gauge ground to battery will elimate any doubt about the ground.

check the sending unit and the rheostat.