The block casting number 3835911 decodes as a 1953-55 passenger car 235, originally with a hydraulic cam and connected to a Powerglide automatic transmission.
As 1955 1 Series said, that riveted plate is most likely a rebuilders data plate and the 3 digit numbers should reflect exactly what he indicted. Since it's been rebuilt, there could be other changes to the engine, like a solid lifter cam in place of the hydraulic cam and lifters. No way to know for sure without closer investigation.
Below is a picture indicating the locations of the stamped serial number, block casting number and date casting codes. The stamped serial number and the casting dates codes will better define the engine details and year if you can provide pictures.
Still looking for info in previous posts about installing an earlier engine into the Task Force Truck.
~ 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)
