I also used the outer cowel panel (deluxe) from Chevy duty and found it fit well and is worth the money, the others do not cover as much and the bends are not as sharp as they should be. the inner to outer and the inner whould be a starting point but for what the retail price is they should be finished parts not starting points.
The oldcarkook was nice enough to put a web page up for me in his site as I am not that good at that sort of thing. If you went to oldgmctrucks.com then clicked on the splash apron you could take a 'shop tour'
I make the following, inner door bottoms 37-55
inner cab corner 47-55
rear fender (runningboard area) patch panel 47-55
Side mount spare kit 53
Cab back panel (conects outer cab corners) 47-55
Splash apron 49-53 GMC
Rear fender center or crowm brace 47-55
and most of the work we do are one of a kind sheet metal restorations Thanks Ray
