On a 1967 camaro with a 327 2 barrel, would the casting # on the manifold be 3877652 or 3910601. I can't seem to find any of the 3910601's on e-bay or craigslist so it makes me think that Camaro's used the 3877652 and the data I'm reading on other web sites may not be right. Anyone have an orginal engine they could look at and report back. Thanks.