440 roller cam conversion parts list.

MomsDuster said

Engine has 915 heads that have had some mild porting and the chambers polished. They also have been machined for the springs that comp recommend for the existing cam that is in it.

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Depending upon the new spring size you may have to machine the iron heads again and/or use spring locators.

A mildly ported 915 head could easily support a moderate street solid roller. We have successfully used .800" lift rollers on 906 heads.