when you start going thru those part numbers it is very confusing for people that havent had much experience..

in the hj it lists 2 upper grilles..one for deville and one for caprice but only one lower unlike the listings for hx and hz.
the upper grille was the same but for the caprice they only had 2 end mouldings with no upper grille moulding on the grille itself..the moulding for caprice in hj hx and hz was a diecast chrome part that actually bolted onto the top apron and overlapped the top of the grille...

in hx and hz for statesman deville and caprice the grilles were the same as each other but again the caprice got the big diecast bit....other differences was only colours of grille slats..

as for hq its the same grille with different paint combinations unless its a statesman..

i have never seen a black plastic moulded hq grille,i have however seen a very dark grey ...