You better make sure that it is an 86 351 you're using. 81 and later models did use the 50 oz setup. So you may be able to use your 302's flywheel. You can not use your oil pump and oil pan from the 302. The 351's pump is longer and uses a different size driveshaft from the distributor. Since the pump is longer, the 302 pan won't bolt up. If the motor did come from an 86 f250, it'll be fuel injected so you will need to get a new intake manifold for the 351. And you will also need to get a duraspark distributor for a 351 to mate with your existing ignition system--if it's still stock. What kind of info are you wanting to know about changing cams? Are you looking for recommendations or some insight on how to change it?
Andy's right, you probably have 2.73's or 3.08 rear end gears in that car. And if the motor does have the 28 oz imbalance, you will need a 28 oz 157 tooth flywheel.
