Originally Posted By: VStock
I have a Chevy six that came out of a 68 Chevelle wagon. The code on the block is F0403AN. Can anyone tell me if this is a 230 or a 250?
There used to be a link on here wher you could look up codes like this, but I can't find it.


VStock:
Look on this page.

http://www.chevellestuff.net/1969/engine_id_codes.htm

Didn't see that code used in 68 so maybe a replacement engine? Worth noting the same code means a 194 in 1965.
Check casting date.
Hope this helps.

Pete
64 Chevelle
61 C30 Panel truck