Once, a long time ago there was a set of NOS GM inner to outers on e-bay that went for $200 +
Yea, I caught that in one of the earlier posts on this subject. What a lost opportunity for someone to use them as patterns and make a set that actually fits.
I also suggest measuring the width of your hood or test fitting to find out if your cowls are too far out or in. This will affect hood to fender gap. Good luck.
Good point... A lot of potential pitfalls replacing the cowls that could come back to haunt me later if I don't pay attention. Probably best to test fit the fenders and hood before welding everything up.