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03-23-2018, 02:59 PM
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Registered User
 
Join Date: Oct 2011
Location: Victoria, B.C
Posts: 3,794
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400 sbc heads and steamholes? add them or?
I was wondering if anyone knew much about the extra steamholes (coolant holes?) issue in the 400 sbc heads?
I have heard that guys have used other standard (non 400) sbc heads and simply drilled and added these holes to run on the 400 sbc engines. Does this not ruin those heads for non 400 sbc applications?....drilling into them?...anyone ever done this successfully?....or unsuccessfully? Or...what has happened when you run regular, non-drilled heads on the 400 sbc engines? ...are they quick to heat up or only under heavy duty use or? Just thought I query the many experts we have here on this site about this issue. Many Thanks!  Coley
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