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.
Attachments
Engine 1.jpg (156.25 KB, 165 downloads)
Engine 2.jpg (61.04 KB, 165 downloads)
Engine 3.jpg (107.25 KB, 163 downloads)
Engine 4.jpg (144.11 KB, 162 downloads)
Engine 6.jpg (87.92 KB, 161 downloads)