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No! Leave those KB400's out of your motor or you'll be doomed to a 8.2 C/R...



Nope , the 400's will give you over 9 , it's the flat top 162 that will create a low compression pig .

As stated you can't get quench with 906's unless you get a custom piston or mill the 906's into a closed chamber.

Just buy a closed chamber head if you have a set of 906's that need to be rebuilt .