'35 sending unit in a '36 gas tank

[Steve in Denver]

Anyone know of the correct adapter plate to go from the 6 screw 1935 hydrastatic sending unit being used with a '36 tank, also a 6 screw attachment?

The one shown on line is a 5 screw to a 6 screw adapter plate.

I tried having the '35 tank boiled out, but there is so much crud in there that he says he would have cut, litterally cut, the tank open, sand blast it and weld it back together. Not something I want to have done.

And if all else fails, what has to be done to use all '36 sending units and dash gauges in the '35?