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  1. R

    Closed / Open Chamber Heads

    Can someone explain the Pro's and Con's with the visible difference?
  3. R

    Head casting number 2406516-8 & -10

    According to my casting number this head was used 1964 thru 1967 on 361,383,413,and 426. Has 2.08 Int & 1.60 Exh. Can anyone tell me if I can use them on a stock 440 .030 over? And use all factory bolt ons. Thanks Ron
  4. R

    75-76 400

    Would it help or hurt the 400 by putting 2406516 heads the the engine. This casting number shows that the head has 2.08 Int and 1.60 Exh valves and is a closed chamber head. Used from 64 thur 67 on 361 - 383 - 413 - 426. The reason I'm asking is that I have a fresh set of heads that have been...
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