Looks like that casting number in your 2nd cam pick matches the "3836390" number from the catalog data.
The Engine Serial# data decodes as:
F = Flint II = November (The capitol "I" was used do indicate the number "1" - so II equals the 11th month) 20 = 20th day of the month (November) HD = 3100-3200-3600-3800-4000 series trucks with RPO (Regular Production Order) #s 308-314 (see below screenshot that denotes codes 308-314 all apply to "Automatic Transmission equipped trucks, with "314" specific to 3000 Series trucks equipped with Hydramatic tranmissions)
The debate on the correct color for your '57 engine has been discussed/debated a bunch. There are a whole slew of previous conversations that you can find using the "Search the Site" tool to read up more on that topic.
Hope this is of some help.
Dan
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
