Ok so I have some sort of damage to the valvetrain possibly rocker arm? Not sure yet but the cab is coming off so I want to make sure when it goes back on I don't have to get back in there unless I decide to upgrade. I'm planning on doing valve springs, push rods, cam, headstuds and main studs and whatever I find broken inside. Any information on brands, where to order from or any other upgrades I should do would be greatly appreciated. Thanks