I have a 66 Suburban with a 292 in it, and I noticed the other day when I was rooting around, that the Engine Block is painted orange, and the Head, Valve Cover, and Side Plates are painted blue. I have seen pictures of engines for sale that were painted blue, and I have seen pictures of 6 cyl's in the vehicle that were painted orange. What should the color be for this 292 in a 1966 Burb? Thank you