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<blockquote data-quote="garbonzo1991gt" data-source="post: 13971012" data-attributes="member: 21067"><p>I was 18psi for over 4 years with a KB Mammoth. I swapped pulleys and upped it to 21psi and lifted the head 1/2 mile from the dyno after tuning... The stock headbolts were the limiting factor in my case. If you're shooting for big boost/power numbers just do the headbolts for now and don't mess with anything else in the long block. </p><p></p><p>"Don't fix it if it aint broke" -Every old hot rodder I've ever met.</p></blockquote><p></p>
[QUOTE="garbonzo1991gt, post: 13971012, member: 21067"] I was 18psi for over 4 years with a KB Mammoth. I swapped pulleys and upped it to 21psi and lifted the head 1/2 mile from the dyno after tuning... The stock headbolts were the limiting factor in my case. If you're shooting for big boost/power numbers just do the headbolts for now and don't mess with anything else in the long block. "Don't fix it if it aint broke" -Every old hot rodder I've ever met. [/QUOTE]
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