Husker, Jerry, Squeeze, Joker, Tim and 49chevtrcknIN, you guys know everything!
Thank you for the compliment, and you're welcome. But I will have to "bow out" of that honorable spot.

I may very well know the least about old trucks as anybody in here.

I'm here to learn from the gurus. You just got lucky with your question.
By the way, I came to the same conclusion as you. The heads are an interesting conversation piece. If I ever run across someone who is rebuilding a '55 car and they are in need of matching heads I'd consider selling them these. But for now, I'll just enjoy the "uniqueness" of the "heinz-57" engine. LOL