'68 GMC to Chevrolet Conversion Questions???

[lolife99]

I know the front fenders and hood will interchange,... I just had a few questions about the small items.
I have a '68 GMC front clip. (with a few parts missing)
I was wondering what parts will interchange?

1) Hood latch
2) Center grille bracket
3) Lower splash apron
4) Core support (with modifications).

My core support is perfect. No rust under the battery.
What is it worth?
Should I keep it and modify it for the single headlights?
Or just sell it and find Chevrolet core support?

Also the grill is painted silver,... but the healight trim looks like someone painted silver, over a chrome set.
(Silver paint is peeling) Can they be stripped and used on a chrome grille?
They feel heavy like "pot metal", not stamped steel.

Sorry for all the questions.
I don't know much about GMC's.