My btr has been in my ute for 2.5 yrs now and have not had a drama, power is 350rwkw , countless passes down the strip and clocked over 68000kms, so I think this subject will be a slogging match wether its good to have a strengthened 4 speed or go c series. all I can say is my own experience and I have only payed for my auto to get strenghtened once. It is a workute and daily driver so my only suggestion is that if you are a daily driver I wouldnt be putting a glide in it, unless its a dedicated drag car, or occasionally sees the street for a cruise/sleeps in the garage.