Slowly doing some work to my engine, trying to make it more... peppy. Anyway, I've done the throttle body spacer and the injector spacer, getting ready to add some Hooker headers, Eastern Tru-Performance cats and MagnaFlow 4x9 Mufflers. At the same time I get my exhaust redone I want to add either a new intake manifold or cam. I'm looking to spend sub $200. Which would be most beneficial to a stock 350 with 135k? I have heard adding a new cam on an engine with this high of mileage could cause you to spin a bearing, any truth to this? I know the manifold is easier to install, but I'm willing to do either.