91 gmc v3500

[cooter26]

Hi guys new to the forum and I need some help getting my truck back in shape.
First off my truck is a GMC but has a Chevy grille and a Chevy bed. I want to put the grille back to stock and already have a GMC tailgate for the bed.
I am trying to figure out which grille and headlights my truck is supposed to have. Its hard with this model because anything that looks close is listed in the 73-87 catalog of LMC. The current grill looks like its off a 81-82 Chevy, but when I replaced the lights they gave me the option of single or dual headlights and the metal behind the grill only has the hole for the current set up.

Thanks for the help.