New to the forum,question on 91 grill update

[tuscani]

This question has probably been answered before but I'm a new member and I couldn't find anything in the search. I am restoring an 88 suburban with a 454. I really like the looks of the 91 GMC four headlight grill setup. The problem I'm running into is that if I try to order a new core support the footnote always says except 7.5L, or 454,.Chevrolet says they are discontinued. Has anyone put one of the kits that you can buy to update the grill on an early suburban or pickup with a 454. Do I have to find a suburban or pickup,with a 454, in a junk yard to get the core support. I'm sure it has something to do with the size of the radiator. I would appreciate any help.

Thanks