An Interesting question was posed over on the FE Forum on a 390/428 thread today.
http://www.network54.com/Forum/74182...f+its+casting-
Quote:
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So lets say you bore one of these blocks out to 4.13. It has the additional webbing, c on the back, but no 428 in the water jacket but soniced ok. Would you be lying if you tried to pass it off as a 428?
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