I purchased a flaming river 16-1 box. Its real nice although its iron compared to the factory aluminum i think the weight difference is with a pound or two. This i think is because the size of the FR unit is actually smaller area wise than the factory aluminum.

Steering quickener wise.
My father has raced circle track for 30 years. He said he tryed a 2-1 Coleman Quickener on a Limited Late a few years ago. It was just too stiff. it was a 16-1 vega box. He went power.

The FR unit is still a handful at 6'3 210 pounds with 225-50-15 and an all steel small block A body during auto x. Hopefully soon ill be trading for a firm feel/box/Sweet mfg steer shaft/ 1.5 Coleman.