Info to share, collected when these were used cars and Ryan was probably not born yet. :)
If I owned one it would be set up for hot laps on the road course...eating horse meat and rice for a balanced diet.
I redacted the last pic for lots of reasons
Disclaimer: I have a low post count so pay no attention to me as apparently one's post count determines the knowledge level of the individual
The block may be full of sediment as well, usually a reverse flush thru the drain plugs in the block will fix it.
The best way to repair a grille is to dissolve grill material in acetone or mek and use the material to re-bond the broken pieces.
Unfortunately I have a low post count so I must not know what the heck I am talking about so maybe you should just ignore good advice because my post count is...