well -- the first place you need to start would be how much room do you have between the bottom of the valve spring retainer and the top of the valve guide seal < and that would be if you know for sure what the installed valve spring pressure is at this time, you can than pick a cam that fits the combo you have, not tryiing to be a smart as but its the way a good shop would do for you if you wanted to know how big a cam you could put in the motor < having said all that their are guys on here who know what you can do with out knowing all of that -- and that is the key to this site -- the guys can and will help you out -- jz
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