The Stovebolt Site Forums The Parking Lot Big Bolts 1952 1-1/2 ton Chevy engine. What's original?

I bought a 1952 1-1/2 ton Chevy recently. It has a 235 with an oil bath air filter and Rochester carburetor with a manual choke.

I know the 1/2 ton had a 216 in 1952. What did the 1-1/2 ton have? I thought some of the heavier trucks had low pressure 235s instead. I'm trying to find out if my engine is original.

Thanks for any help on this issue.