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franklin2 is correct. The difference between 2v and 4v matching up is totally different. What I did on my 351c 2v is purchased the edelbrock 351c 4v perfomer, dual-plane intake. You can get on on ebay for around $150.00
A previous poster said that you need the Performer 351C 4V intake, but that is not what you want. That is designed to work with the 4V heads and would not perform well for you.
You need the "Performer 351-2V (non-EGR) #2750". This is directly from their web page. It accepts a 4V square flange carb, such as a Holley or Edelbrock but works with the 2V heads.
I am confused on one point though - you say that it is a 351C 2V engine, then you say it has a stock 4V intake and carb. Are you sure that it has 2V heads? It may be worth checking because if someone swapped on a 4V intake and carb, they may have swapped the heads also. If so then you do indeed need the 351C 4V intake.
Tom
(1973 Ranchero with 1972 351 CJ and front clip)
Toms right with the intakes on the 2V and the 4V. I have both a 4V and a 2V cleveland and both of them have the intakes. The one says performer 2V and the other says performer 4V.
People who say it can't be done should not interrupt the person doing it.
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