Help: Can't Find Some Blazer Tank Info

[SCOTI]

I remember reading some info about the inlet on the steel blazer tanks somewhere here but can't seem to find the post/thread that has what I need.

The 'stock' blazer tank inlet-tube is secured to the tank w/2 small studs/nuts. It seemed as though they would just un-thread to remove the inlet from the tank but the nuts won't budge (I tried w/a long handle 3/8 ratchet).

I remember someone posted the 'tip' on how to properly remove the nuts from these studs. Does anyone know? I tried heating w/my small butane hand torch that I use for wiring jobs thinking I just needed some heat but that didn't help. Do I need to heat the studs more or what's the trick?