I'm sure this has been discussed before but the "search" funtion is not helping me with the answer. I'm converting my truck from 6 to 12 volts and need to place a resistor in the gas gauge circuit; what size should it be? I have a Radio Shack here locally and just need to know the values for the resistor (I know these are sold from commerical websites but want to get it locally). Thank you.

ron