Later model 6-hole ralley wheels and Isuzu caps
 

Years ago I had these 6-hole ralley wheels and someone on hear suggested using Isuzu Trooper hubcaps. I did this and happened to have some aftermarket spinners that I mounted up as well. You could also use 4" dome/wide angle mirrors and glue them on. Once you get the Isuzu caps, all you have to do is cut off the 6 extensions that go into the holes of the Isuzu rim. This could be done with a hacksaw or Dremel and then just mount them up on the Chevy rims. You can see the finished product below.

I just thought I'd share this with those that have the 6 hole ralley wheels or are thinking about going this route.