Don,
Thanks for your interest. I assume the 637 you have is in your GMC ladder truck. Am I correct? I like the looks of that rig and have a fondness for fire apparatus (after 10 years as a volunteer fireman and EMT many years ago).
I'm sure it was a typo but to correct it for anyone else that may read this, my V-6 engine is a 478" displacement.
I'm also interested in your Plymouth Belvedere. My folks first car when they got married was, I believe a '53? which I think they said whas Salmon and Black colored. I'd love to see a photo of that car, if you don't mind.
Thanks,
Steven