gears will not help in 34s, get the Tomei type B cam. otherwise don't do anyhthing
Also you need to take into consideration that stock rb25 can take approx 400rwhp. I'm not sure the turbo size you want to chuck in.. however If you intend to have a GT30 and make 400rwhp on stock internal, do not change the cams, if you do, the power will increase further engine will stuff up even faster~~
ignore the gears until you get turbo N other stuff done, decide after everything is installed.. gear installation got nothing to do with turbo side, so doens't matter if you do everything at one go or seperately, you gonna get charged all the same...
.. but if you decide to still do it I've got brand new HKS in and ex gears for sale~~`