I guess that's what I really like about "stock" engines, no real way to spec them, and be certain you've caught everything someone can do to a "stock engine", ask Joe Gibbs. Measure the bore and stroke, and as far as I'm concerned, that's it, unless you want to work all night and the next day, teching engines, these things are so borderline, another .010 off the block makes it a hand grenade looking for a place to explode anyway, that puts the piston/deck at about .020, which is almost a certain piston/head crash. JMHO! Bob