Just before of the front xmbr, and aft of the forward most LCA pivot are two (2) horizontal square tubes, each with a hole on their inboard ends; what are they for?
It's been a while, but I'm certain that my lower radiator to frame brackets sit flat on the leading edge of the crossmember, attached with two (2) bolts per side; the upper bolt holes being visible above the sq tubes in your picture below.
Custom radiator? Custom electric fan? Doesn't seem to be an ideal location for a suspension support brace, nor does it look to accommodate a removable crossmember.
You got me, I give up... ? ?
There are going to be times during your build that you'll just want to throw the whole thing in the pond (we have a couple of ponds surrounding half our lot, and "I feel like throwing *it* in the pond!" is my standard threat when some
inanimate object gives me grief...). You'll want to persevere until you've mastered the situation, but I find that if I
just walk away, what seemed insurmountable only an hour before can be more easily accomplished with a fresh outlook.
Looks like you have an ideal work setup__gorgeous shop BTW__and I'm more than a little envious, wishing I was embarking on a full scale project myself! Perhaps within the next year, as I'm winding down working on other people's cars, so maybe I can do something for myself again.