Hemi Exhaust Port Size ... Gaskets/Flange?

[Hemibird]

Been searching the internet for days. Does anybody know the stock exhaust port size on a 66-71 Street Hemi?(1970). Also, is there a flange gasket between the rear of the cast iron headers and the rest of the exhaust. I'm 90 miles away at the moment and can't crawl under and look.

The guy who owned this 1970 RR before me drove it 4 times in 8-9 years. All kinds of little leaks/issues are showing up. Just rebuilt the carbs, and most recent is a blown exhaust gasket. When I get home I'm going to replace all the exhaust, intake, valve cover and spark plug tube gaskets, and would like to order them so I have them this weekend. Thanks in advance.

 

[Hemirunner]

If it has the cast iron exhaust manifolds, you'll crack them using a gasket. Just use high-temp orange RTV in place of a gasket to seal them up and they'll be good to go.