A manual tranny is faster but you have to power shift it in the RPM power band, some cars around 5500 rpm. A regular 4 of 5 speed tranny cant handle it.You are better off getting your auto tranny beefed up(since you have a hook). First check out the price on a semi high manual tranny first to get an idea on price.It might be cheaper to redo your tranny.Take care and good luck.What's the name of the shop post it here maybe he can help out some members.