70 dart swinger slant turbo build and mild restoration

So I'm ditching the 3/8 header flange I think the thickness difference between the intake and exhaust flange at an 1/8 will just be a pita to deal with so im having him make me so 1/2 flanges then a t3 flange with extra meat the one on the right is what I'm talking about I can trim it later but will be nice to have the extra material