I agree, they exist so I'll be pulling out some old fillings to get them : )
On another note, When I looked at the ebay link that Jay posted (thanks for that) I decided to see if their "Does it fit your vehicle" function matched my late '55 block. It says "This parts does not fit your vehicle". So, I scrolled down to the part number that the ebay seller had listed for this bearing set. It is MBS1175-010. I just put that number into a google search and came up with this on the Summit racing site
https://www.summitracing.com/parts/kaa-mbs1175-010#overview Same info, same part number, same pics, same "it does not fit your vehicle". They look correct, any confirmation votes on these before I pull the teeeth?
Thanks so much for all the help, priceless!