The 350 is a lighter engine than the 235, so there is less weight on the front springs rather than more. Perhaps that may have some effect on the panel triangulation? I don't know.

Yes I removed the grill, top of the radiator support, radiator and the hood and slid the new engine in right through the front.
So it is conceivable that when I remounted those things, I changed things enough to where they didn't line up well.