You are correct. Mine is 1970, I think, but should be the same. Not sure if you can get to it without removing the tank, can't remember. I already had my tank off to replace the water pump.
Working on getting the tank off now. Would have been nice not to have to do that.
Getting the tank off isn't too bad. I've been lucky and not had to bleed the fuel system when only removing the tank, but when I split the tractor and unhooked the fuel lines, it was a bit of a pain to bleed. Good Luck!