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Bill,

I know this is a little off topic, but I'm hoping you can give me some insight.

How much can safely be milled off Poncho 389/400 heads (to boost compression)?? How much valve train clearance is there prior to any such machining - i.e., what's the max recommended valve lift under stock conditions?

[This message has been edited by Huck (edited 02-21-2002).]
 

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Whats the head casting numbers and what size engine did they come off?

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70 Camaro 307cid(350soon) /350th ex. dark purple (dark blue soon) in. black
74 Trans Am 400cid/th400 ex. red in. red power windows
 
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