What 6 Cyl engine is in a 63 C10?

[rico_bob]

We just bought an engine for our recently aquired '63 (which had somehow ended up with a swapped over engine to a 250 from a '69 Truck).

Now the engine we bought was suppossed to be the original engine in a 1965 C-10. (We were looking for a 250) But when I ran the number (on the block to the right of the Distributor), the engine came up as a 230 CI 140 HP in-line built for the 1965 Impala?

The guy who had the 65 it came from says it was the original engine? Is it possible that the 65 C-10 was built with a 230 140-horse made for an Impala? Was a 230 an optional engine in 1965?

I am pretty sure that the 230 was not offered in a 1965 C-10. Anyone know?

Thanks! rico