What bolt pattern were the 15x8 rally wheels for 1970? I'm thinking 5 x 4.75.....
I had a set with bolt ons from a 74 that fit my 84 delta If I remember correctly..... they magically disappeared from my property years ago however...

 

I think I am going to pick some up, I always hated when those trim rings got loose though. Ca clink ca clink ca clink I'm gonna paint the rings on in grey I think, and ditch the chromies.

 

All Olds SSI, SSII, and SSIII rims have the 5 x 4.75" bolt pattern

 

I re -found a grille that's been sitting around today. LH 397843
I don't even remember what it was from.
Heavy metal sucker though, not plastic.