fuel gauge reads wrong
First thing to do is figure out if the gauges are accurate. The oil, fuel, and temp all use the same resistance. Find yourself some test resistors, and hook from the gauge wire to ground, turn the key to "run" and wait about one minute
http://www.forabodiesonly.com/mopar/showthread.php?t=179517
The test resistors are
L = 73.7 Ohms (empty)
M = 23.0 Ohms (1/2)
H = 10.2 Ohms (full