The main differences can all be done by suppliers so not too much to worry about - drilling & tapping the case for full flow can be done by the same supplier who clearances the case for bigger cylinders
If I were you I'd get the bottom end (crank, rods etc) dynamically balanced. If you're going to make more power at higher revs you want the engine to be able to take it.
Have you got Keith Seume's Engine Interchange book?
If I were you I'd get the bottom end (crank, rods etc) dynamically balanced. If you're going to make more power at higher revs you want the engine to be able to take it.
Have you got Keith Seume's Engine Interchange book?