The center support that holds the hood latch assembly as well?
Hood Latch Support
Mounts to the core support with one 7/16" double hex head tapered screw with integrated washer. The fixed nut for this is located near the bottom center on front of the core support.
Irregularity: One hole was drilled into the support for an auxiliary transmission cooler. This needs to be welded.
Hood Latch Assembly (mounts to the core support etc.)
The assembly mounts to the core support, hood latch support and outer grille using four 7/16" head double hex tapered screws, with integrated washers, and one hex 1/12" head tapered screw with integrated washer. The threads on all five are the same. The hex screw was located in the center of the assembly on the RH truck side.
The two screws on front of the assembly mount on top of the outer grille. One goes through the outer grille into the hood latch support, the other into the J-nut on the outer grille.
Bolt Catch Plate (mounts to the Hood)
The bolt catch plate mounts to the hood using four 1/2" head tapered screws with integrated washers. There's a fixed nut in the hood for each.
Reference the hole in the hood located on the rear RH (truck side). Facing the latch in a mounting position, the hole in the hood was located to the rear and right of center of the bolt hole in the plate. See image. Note: Try centering everything first.
Reference the hole in the hood located on the front LH (truck side) for the plate. Facing the plate in a mounting position, the hole in the hood was positioned the same as above. See image. Note: Try centering everything first.