Otto - Recheck the Master Parts Book extract I posted. Both item part numbers marked with an arrow are the "lower baffle" aka "lower splash panel" he's looking for and are not "number seven" in his picture. The description is clearly indicated on both arrow marked items in the center description column as "lwr". The same parts group "1.286", list both "lwr" and "upr" (aka Upper) baffles (aka splash panels) by separate part numbers in that listing.
Below is a screenshot from another fellows truck showing the lower baffle (splash shield) installed across the lower front fenders and just in front of the radiator support. The two upper "batwings" IHPWR mentioned actual get bolted to the sides of the radiator support, sandwiched with the vertical lower side splash panels that also bolt to the fenders.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)