408 W2 combo - where to from here

I'd be curious to know rpm at the stripe , but I still think a more efficient converter is the first thing I'd throw at it.
Most of the engine stuff i.e. carb , porting would help the 60' but I don't think as much as a good converter. I think the launch is where the most hay will be made as far as improvements. 1.9 - 60's and a buck thirty ? Throttle stop ? lol That sucker must march like Sherman on his way to Atlanta once it gets moving.