Hi, I also have the dome shaped caps. The other ones wouldnt fit on my standard rims so had to go for the dome shapes that accepts the clips. Bought them new from classicparts and is very happy with the quality. It was a GM restoration part. I have the later style hood so it is something I have to live with. Wont be able to find a jet pod here in Africa!
By the way your truck looks good. Enjoy the refurbishment.