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www.autocrossing.com
it depends on how much hp you have. if you have around 300whp or less id go w/ the b16. 300 to 700 gsr. ls tranny has to long of gears unless you have alot of power, then some prefer the ls to make sure the power goes to the ground.
i have a b16hydro w/33,000 fresh rebuild w/ls 5th gear and phantom lsd for sale if interested..