A 46 COE probably had the 235 (my early 235 had '235' stamped into the pan on the side). Your 'stamped' number next to the distributor should be the VIN, cast number on the block will tell you the CID.

It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed