Hello to the forum. Background: After a very long time, I am finally gaining some traction on the resto mod of my 1950 GMC 3/4 ton truck. Along the way we've gone through several iterations of engine. The truck was purchased with a stuck 216, which was pulled after some failed attempts to get it loosened up and running. After that we tried a 270, and also a 302 (also stuck) which finally prompted me to search out and install a Chevy 235 based on some success stories here and elsewhere. Interoperability with other Chevy and GMC parts was also a factor.
Seeing a 1953 235 advertised on a local online auction site, I promptly purchased it. I was also heartened by the seller's description of the engine as coming from a Corvette, with the improved lubrication system. Now that it's home others who've seen the engine say that it's NOT a 235.
So, I'm asking for assistance from you all so that we can ID and set this thing up properly. I've attached several pics of markings on the engine block and manifold. If I need to provide more info let me know. Please advise, and thanks.