[Zman]

Pablo is correct, the input shaft is longer on the 914 transmission, so get a 914 flywheel have it machined (lighted if desired), but it already has the bearing and will work perfectly. If you can get it balanced with the crank you will not believe how smooth the engine will be. I purchased one from Jake and he balances it down to which bolt on the clutch goes into which hole as part of his engine kits as well as the clutch itself. It is amazing how smooth it runs with his balance job. But if you can balance it with the crank, well worth the effort and the extra $ IMHO.