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1973 mach 1 351c has an intake opening at head of 2.6x1.8. edelbrock manifold 2665 fits but the opening at intake port is 2.1x1.3 what is the purpose of smaller intake opening

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  • Ford Master
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I am going to take a few guesses here. Some intakes fit a wider range of products. Narrow opening could raise CFM draw due to funnel effect. Also don't remember if this year had 351/400 block. Some castings were taller, internals changed to drop from 400 to 351. Would not need big airflow for smaller 351.

You could check out the Elderbrock site for help. Difference between "Yea they fit" and "Yea, thats the right part".

Posted on Oct 24, 2012

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SOURCE: What is the bolt torque settings for an intake

Intake Manifold 5/16 Bolts Non-Hardening sealers 25 ft-lbs
Cast Iron Heads 3/8 Bolts 30 ft-lbs

The torque sequence is snug all down then just star left rear then right front then right rear then left front and so on

Posted on Nov 27, 2009

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tneubauer
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SOURCE: I'm trying to change the intake manifold and

As best as I can tell from the Edlebrock website and the information you included, you have the wrong intake. The intake you purchased is for "C" or Cleavland engine or even a "M"; when what you have appears to be a "W" Windsor engine.

Posted on Jan 25, 2010

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1973 mach 1 351c intake openings is 2.6x1.8 edelbrock manifold 2665 has intake opening of 2.1x1.3 what is the purpose of the smaller intake opening on the intake


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