Hmm interesting.
With the amount of punishment my standard box has taken i cant believe the gear teeth are still attached.
1st,2nd and even 3rd gear launches and still no breakage (excluding syncros)
Which is why im thinking the PPG helical cut "has" to be far far stronger.
The noise of a straight cut would get on my nerves after a while especially on cruises.
Brad, the gearsets that you might have for sale, are they all needing a new bellhousing?