Pardon my ignorance but I'm trying to get my head around
4V heads and 2V heads.
I know
4V means 4 venturi and 2v, 2 venturi carburettor.
I have an XC 351 that originally had a Carter Thermoquad which I replaced with a Holley.
I have been told I have 2V closed chamber heads, so how can that be if it had a Carter thermoquad (quad meaning 4)?
My next question is I've found some extractors at a good price described as F series (presuming for an F100 or similar). So if I have 2V heads will it be ok to have
4V extractors? I can understand that it wouldn't work the other way, that is 2V extractors on
4V heads.
So can someone please in simple english explain this mystery to me, cheers.