Hope somebody out there has set one of these allready. I installed a set of aftermarket gauges in my 58. I have a problem with the fuel level sender. The factory unit is 0 to 30 ohms and the sender supplied with the gauges is 240 to 33 ohms. The stock tank is about 6" deep and the new sender appears to need a tank that is at least 8" deep to get a full to empty sweep on the gauge.