Mid-America transmissions. Probably the best shop in St Peters. They rebuilt my 200-4r to GNX specs ... it was in the 86 Salon and even with the lameduck one foot in the grave 307, it shifted neck snapping hard. I've heard of GN guys running in the 10s still with the 200-4r. In stock form they had issues but those GN guys have pretty well bullet-proofed them now.
