alternative 4spd

have you ver thought of getting a gear vendors overdrive unit. bolts right up to the tranny, and youll automatically have a 6 speed instead of the 3 speed. they cost around 2500, seen some on ebay though for about 1000 less than that, and it has warranty. I might end up doing that istead of doing an A833 swap that I intended to do, its a lot easier