Be sure to install the clutch disc with the side indicating "flywheel side" against the flywheel. If your clutch disc is not marked indicating which side of the clutch disc is the flywheel side, please contact its manufacturer.
Always torque all hardware to factory specifications. Replace hardware if it's worn or if the factory service manual recommends replacement. Proper hardware (shouldered bolts, dowel pins, etc.) used to affix the pressure plate to the flywheel and the flywheel to the crankshaft are special pieces and NOT ordinary hardware. Failure to use proper hardware could result in a vibration, improper clutch operation, or clutch failure.
Do not allow any petroleum-based products (grease, oil, lube, and so on) to contaminate the clutch disc friction material. If contaminated, the disc may cause clutch chatter, slippage, premature wear, or improper clutch operation.
Avoid mixing brands within the clutch system. Most companies design their products to work best with their own products. This helps guarantee proper performance and lifespan. Also, you'll have an easier time on a tech line or with a warranty should anything go wrong.
Seek out and follow the required break-in procedure for your new clutch assembly. Each manufacturer will vary, but following it is necessary to ensure proper seat-in of the friction material, full performance, and proper heat cycling. Failure to do so may result in premature wear, decreased holding capacity, improper clutch operation, and will void most warranties.
Most any clutch company will be happy to discuss your clutch problems/needs with you over the phone and help you select the right clutch. You shouldn't be too worried about them trying to talk you into an expensive unit that's overkill for your daily driver or weekend toy because they want you to be happy with their clutch and retain you as a loyal customer. Installing a clutch into your truck that's anything other than what you really need can cause everyone involved quite a bit of grief, not to mention money.
Below is valuable reference material from Centerforce for people with three pedals at their feet and anyone thinking about ever owning a truck with a gearbox. Be sure to file this issue into your library of old motors and factory shop manuals should you start "slipping."