Headers vs. Manifolds

Wish I could tell you! Between the 100-degree Texas days, my non-A/C shop, and life's other challenges, progress is SLOWWWW. I fell off of one of our horses 2 weeks ago and seriously busted my a$$, still recovering. That's one of life's challenges getting in the way, lol.
I spent a month or so building a cooling tower next to the steel mill in Seguin in 1993. 100F+, high humidity, and every hour or so they would pour slag out on the ground near where we were working. That was special.