The bolts on the pressure plate are all the way around on the outside of the of the flywheel. Most likely the bolts you can see. Getting to them will be very difficult if you can't turn the engine. That means....impossible. Find some way to turn the engine before you remove the pressure plate.( just a question, pressure plate or presser plate? I have used both but then I get stuff wrong a lot) With the engine in the truck you can free up stuck valves with care. Even pull the rocker arm but take care not to bend a valve. Removing the head is just work. But the head is heavy so don't get hurt. Turning the crankshaft and oiling the pistons in the bore is easy with the head off and a lever on the teeth of the flywheel, with a "fulcrum" at the edge of the bell housing. If it is still stuck, Don't force it. Pull the side cover and remove the lifters. If one is stuck it can harm the cam. I use a drill to make holes in a long board to keep the push rods and lifters in order to prevent mixing them up. If it still won't turn, pull the pan. Should have come off in the early stages to find why it wont turn. If the crank shaft will move a bit at this point you have a stuck piston. With a light oil such as Kroil, WD-40 and a plastic mallet you can free up most stubborn Pistons.All of this is to let you get to the presser plate bolts. When the pressure plate is off. The fly wheel bolts are in the center of the fly wheel. The dowel pins are under neath in the crankshaft and the fly wheel. You might have to tap the fly wheel with a plastic mallet to loosen the pins. The bell housing to block bolts are behind the fly wheel. Pulling the crank shaft will require removing every thing from the front of the engine. That includes the cover, cam, timing gear, plate, and front mount. Not needed until you are on an engine stand. Don't be afraid. I just included the absolute worst conditions you might find. Take care with the oil pan on a 216. It has troughs to splash oil onto the Rod bearings. There are shims on the main bearings and maybe the rod bearings. So keep them all in order to put back. At some point you will have to decide how much you like this particular engine. It may come free, and turn with out dis-assembly. That would be good. It may take some time. Check out the manual for your truck for more details.
