Hi Josh,

maybe we have mixed up some things.

The NAG 1 722.618 5WA330 is the stoch AT tranny for the N/A. It is specified for 330 Nm
The NAG 1 722.618 5WA580 is the stock AT tranny for the SRT6. It s specified for 580 Nm
The NAG 1 can be modified up to 900 - 1.100 Nm

The GM 716767 SG-S400 is the stock 6 speed MT tranny for the N/A. It s specified for 400 Nm

Phil did a lot of V8 conversions, not only one. The one i was talking about was a M113 5.0 N/A in combination with a stock MT 6-speed used in a N/A.

Regards
Markus