best 351c build up for street

Discussion in '1965 - 1973 Classic Mustangs -General/Talk-' started by lewis_dd, Feb 16, 2006.


  1. lewis_dd

    lewis_dd New Member

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    i have a '73 Mach 1 with the 351c 4v open chamber heads. I want to get some more power and speed from it my signiture shows what i have now. I have full length headers not installed tet, and could either put flat top pistons or put closed chamber heads a cam, etc.

    any suggestions?

    Thanks

    Darren
  2. DarkoStoj

    DarkoStoj Founding Member

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    i have a solid roller, 4v heads, long tube headers with 3" exaust, edelbrock dual plane intake, and edelbrock 600cfm carb.

    I bought it like this, it doesn't pull hard until 4500rpm, and I think that it would rock with a different intake/carb
  3. rbohm

    rbohm Founding Member

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    first decide what rpm range you are going to run this engine about 85% of the time. a street/strip motor is different than a race motor, is different than a daily driver motor.
  4. milner351

    milner351 Founding Member

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    Generally for the street, 2v heads are better, and much more responsive in the lower rpm range...
  5. D.Hearne

    D.Hearne Banned

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    Swap the factory cam for something better like a Comp Cams 268H. That would boost the dynamic compression to help the open chambered heads and should improve the bottom end. I'm not a fan of Edelbrock carbs, so I'd go with a bigger Holley like a 670 Street Avenger or list - 80783-- 650 cfm vac. secondary carb. Summit's cam part # SUM-K5200 would also work well. I used one in a stock 400M and it really woke it up. Same open chambered heads but with 2 bbl ports as your 351C.
  6. 351carlo

    351carlo New Member

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  7. 1320stang

    1320stang Founding Member

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    You could also put port plates in the exhaust side as well.
  8. Dan H

    Dan H New Member

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    For the street, get some Aussie heads (Closed Chamber, Small Ports) and a nice dual plane intake, a good cam, and good well tuned carb.

    The closed chambers have much less trouble with detonation, and the smaller ports will have good TQ.

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