Quote:
Originally Posted by allison-tech
Can the stock head be milled for better compression? If so, how far can you go? If valve clearance is an issue, could the head be milled with a slight angle? I realize, of course, it would have to be a very slight angle along with slightly elongating the holes for the head-bolts to compensate.
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Yes, you can mill enough to help quite a bit....
You may need to have flat top pistons.
I have taken .125 off many times...I never checked one to see what compression it ended up but the customer's said it really made a difference in performance.
Angle milling is common practice on racing heads.
Valve clearance is usually not a problem on a model A but should be clayed to check.