Pete, my Crown UZS131 manifolds look nothing like those. The drives side manifold has a big divot and compression in it to provide adequate room for steering box clearance. Also the flanges to the mid pipes only have 2 bolts rather that 3 as on the Lextreme site.
Yeah, mine are the same as yours GT, but it still fouled
They hug the block more, and first cyl isnt curved, but cut at an angle and welded
These are the ohter crown ones btw (or maybe the soarers)