agree 100 percent,
on projects such as these they demand and deserve perfection (or as close as possible) don't skimp on any parts. especially sheet metal.
As far as sheet metal goes I have used many different brands for many e-bodies, anything from trunk floor, frame sections, fenders, (front and rear), inner & outer wheel wells, floor, hoods, header panels, valances ,door skins, roof skins and everything in between, overall AMD or (I personal purchase from Tamraz via eBay-which is AMD or better) is the best for body line, contour, gauge, finish and fitment.
On one car in particular I replaced the whole side, front to back (all outer body metal) the only brand that mimicked everything
(maintain size, shape, thickness and body lines, true) was AMD.
just my two cents!