Interior Access Panel to Sending Unit in 70 Duster?

CRUZE 418 said

Don't cut an access, just, don't do that. Mega Parts, Vans, Year One, Classic, several places for a wrench, their about $15.
First off, you know that all of the new senders are junk and incompatible with your fuel gauge, right? Is the orginal sender still in there? Why do you want to pull the sender, is the gasket leaking?
I have always dropped my tank out, hell, it's out right now, but I think it's possible to pull the sender out without removing the tank.
Kim mentioned this already.

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I'll check around for a wrench, it leaks like Niagra Falls when I fill it all the way up. I could not get the new unit to mate surfaces with the tank. I mean like the ring was too small. I have another new unit with a brass float and ss line that I'm hoping will work. I have the original ring that I believe should do the trick. I found it accidentally when rummaging around through the trunk in a small tool box. Smart thing to save that old ring. The new one was not lining up. I got a new unit from Gastanks.com or something. Had one of theirs before that worked pretty well. Yes I know about the rheostat being crap on the new units. Damn China. All the work is in draining the tank and pulling the tube, disconnecting the line, why not go ahead and pull it when it would make swapping the unit so much easier? The tank is light then, the bolts are already loose, I mean I don't think it would save work to change the unit while it's half way on the car? Anyway, it will last for years and years if I can get it on right, I don't have to cut an access panel if it would ruin the value of the car, just tired of pulling the tank to work on these faulty units. That's all.