prot68

Need opinions. Im replacing a 307/powerglide combo in a 68 chevelle with a 2008 6.0 with vvt. At the same time I'm seriously thinking of converting the car to a tko600 with the .64 OD as I have previously installed a 3.42 tru trac rear. Should make for some great fuel economy to go along with new found power. Since Im going from an auto and basically starting fresh, do I go with the upgrade to hydraulic clutch or go mechanical. Those who have experience please chime in, Im ready to place an order.