TTI header woes

Looks like I shoulda posted that chart earlier, sorry .

I had a similar situation on a Chally bblk, couldn't get the motor over any farther, so took a belt sander to the header flange to tuck the bottom in away from the T-bar, then draw filed till fair.(that header was fkd)
I also use a ratchet strap around the trans to draw the header away, - on much closer clearance issues.
Haven't seen one dinged like that since one dude pounded the top of the tubes flat, - trying to get it in from the top, seriously.

I come from the era of headers that needed every header flange draw-filed true, - if you didn't weld up the dips and file the bumps to get the flange to seal, (nobody did that), - and then spent decades bitching about header leaks, and the cost of Remflex gaskets. LOL.
My mentor wouldn't let a leaky set outta the shop, - I filed/welded every set.
Never used anything but the flange gasket supplied by manufacturer or Mr Gskt ever .