I wish i had the money for this.
Alot of people assume that all big blocks had 18 spline hemi 4 speeds behind them; it's funny how people hear something offhand a few times and then it becomes fact.
If it's an A-body trans it's most likely a 23 spline. It's possible that a hemi box was modified with an A-body tail shaft and housing for it, but I would doubt it.
Either way, that's a hell of a deal. if it was closer I'd be next in line to pay cash for it.