Quote:
Originally Posted by osidak
this is a little off topic here as I am doing carbs but should have some cross over info
1978 ROW 911 SC with large port heads (39mm) - planning to use PMO intake headers (PM-O911-0) which are the 46/39mm Tall for CIS.
looking at gaskets and heat insulators - for CIS heads there appears to be only 38mm or 40mm - which is the preferred size for my application - go undersize or go oversize
my apologies for being a bit off topic but this thread is a lot more active than the one I started.
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I would go with the 40mm gaskets and keep them out of the air flow.