I think I can put a cap on this engine color problem everyone is having. There were several colors used to paint GM engines. Three of them are available at local part stores. The widely known
blue and
orange and most recently making its way to the shelves is
Detroit Diesel/Alpine Green. The gray is not as available but
Eastwood seems to be selling the least expensive quart. I have yet to find anyone reproducing the other colors but I am sure Eastwood would be willing to match a chip. In my searching around while writing this post I also found a 'new to me' resource for parts and information called
The Filling Station. They have a few oddball parts and paint colors in their inventory that I haven't seen elsewhere.
This is the most extensive list of correct engine colors for GM I have found. The article has also been posted on
Jim Carter's website.
I hope this helps everyone out.