The intake manifold is more likely "3835590" which is listed in my resource references as used on 1948-56 235's.
The exhaust manifold casting number "3835587" is also confirmed as being listed for 1948-56 235's.
Looks like a matched set ready to find a new home.
Best if luck!
~ 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)
