Update Please Read
Full porting instructions for iron passenger car castings.
Light info on PI and Eddy castings.
Other relevant information about distributor recurving, timing set differences and porting tools...
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For those wishing to port their own iron passenger car heads RHP has in depth instructions with tons of pics to guide you along your way.
There are additional informational pages such as early and late timing set differences, rocker arm differences and pics of ported iron cj, pi, eddy aluminum and A-429 aluminum cj castings.
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We offer email help in clarification as needed.