Well I've got this book (binder really) with all the specs I could want. And from what I gather from it is the only difference between the engines is bore size (66.00-66.02 mm vs. 69.00-69.02 mm), piston oversizes (66.25, 66.50, 66.75, 67.00mm vs. 69.25, 69.50, 69.75, 70.00mm), camshaft intake...