I'm ordering a new sending unit for my 1969 Roadrunner. My factory fuel gauge is still giving me fits even though ive gotten every other gauge and dash light working. my question is, has anyone ever just installed an aftermarket stand alone fuel gauge on the bottom of their dash? can i buy one and just wire in that one direct and just ignore the factory one up in the dash? would i have to buy a particular gauge or would any work since im starting new?