SF20 gas tank dimensions

[muddywater]

I am looking for dimensions for a a belly tank for a SF 20.
All the threads I could find on gas tank size were for the 23's. I cannot measure my old tank because my old tank is a console tank (above deck) and I just cut 10" out of my console and glassed it back together.

My old tank is actually in pretty good shape and it occurred to me that I could possibly rotate the tank 90 degrees and still fit it except that I had already started glassing a flange to the inside of the console so it won't fit.

I thought it was going to be possible to get a pre-made tank, but it appears that most of you have custom tanks. The recommendation seems to be S.P. tanks, so I was wondering about dimensions and how you take into account the height of the fill and vent connections.

Thanks!!

-Muddy