which cam out of the following...???
G5X3 112 will fit stock heads, but piston to valve clearance is slightly below safe street margins, but a few poeple run it this way.
take the average of your two durations
take double your LSA
and find the difference
ex: this cam, 236/239 .600/.611 111 LSA, has a 15.5* overlap
which is figured by 236+239=475/2= 237.5
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That's what I would recommend as well.