351C heads

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Just got my heads back from the machine shop.
( "simple?" valve job) I did not realize that
Cleveland engines were so obsolete. Next job goes to one of the specialists - hot rod shop or Pantera shop.
The intake manifold (Edekbrock Performer) has a passage across the middle that appears to be exhaust. The new gasket has no hole for this passage. Is it necessary? I am assuming that it has something to do with the original exhaust heat for the choke. The last guy to work on it chewed a hole in the gasket for this passage. Should I do the same?
I saw a question about availability of the Edelbrock manifold a while back. The mail order hot rod shops have them. I use Barnett in Atlanta and JEG's in Ohio.
Thanks
Jim Hendrickson

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4/24/0110:06 AM

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Original Post

bosswrenchMember

Thats correct: the passage does bleed exhaust into the intake for fast warm-up and to operate the stock choke. Unless you live in northern Canada or drive in sub-zero temperatures, you can block off this passage on both sides. It will yield slightly more power and oil mileage, slightly longer warm-up times. No big loss IMHO. Most aftermarket intakes do not have this passageway cast in.

5/5/014:17 PM

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