i have used the griner manual vb with the band on in first gear in four transmissions i have done one had a 2.9 lever , a 3.2 lever they shifted mint.no overlap on the 2-3 shift.all of these trans originally had turbo action valve bodies,that were burning high gear clutches.all of my customers noticed a diffrence in shift feel.one unit i got to recheck because he broke the motor ,the clutches and band were mint.it is the best vb you can buy.give 727 specialist a call he can hook you up with a vb later john.