Mike - I did some web surfing for ads in your general vicinity. Only one FBM ad for a 235 within the 150 radius is listed 235 in Harpers Ferry, WV. It unfortunately doesn't indicate it is a known good running engine. Just mentions it "turns over freely". The casting code confirms it's a low water pump 1959 block, but no serial number to confirm further details.

I expanded my search to 250 miles, just to see if there was anything lurking farther out. These are the next ads currently listed, some saying running or removed from a running vehicle:

1957 running 235 from a car in Lebanon, PA

taken from a 1956 sedan - running 235 but smokes and needs rings in Sanford, NC

Chevy straight 6 235 - sitting for an unknown amount of time and will need work in New Tripoli, PA Note: pictures show a Dec 27th 1954 block casting date for casting code that match 1955-57 235's. Guessing this is a very early 1955 model year engine.

1954 Chevy 235 in used/good condition in Donora, PA Actually about 275 miles distant from you. Does say it was pulled to do a SBC swap, so maybe in running condition?

Sorry that there doesn't seem to be any better candidates than these, but perhaps one may work?

~ Dan
1951 Chevy 3 window 3100
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