So... think I will settle on this one...
https://www.ebay.com/itm/334262292093
Outlets in the right spot, drain in a good spot on the bottom and after measuring the core support, I have 20 5/8" between uprights and just have to trim the "wings" to fit the max with of the support, mark the mounting holes and I should be good.
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'51 Chevy Build - In the design stages
Aut viam inveniam aut faciam - I will either find a way or make one.
If you don't have time to do it right the first time, when will you...
My new build -
https://67-72chevytrucks.com/vboard/...70#post8958970