the ofna / jammin stuff is pretty easy to install . you probably havent ever put a 3 shoe clutch system together i am willing to bet ?? looking at the flywheel installed on the crank , the engine will rotate counter clock wise , the clutch shoes hang off of the posts so that they trail in rotation
make sure you use the spacer shims that go under the shoe , then install the shoes with the spring in the shoe over the post ,
make sure the part of the spring that sticks out of the shoe to the inside is on the side of the crank that would pull the shoe into center and closed position and create tension when you stick your tuning screwdriver between the crank and the mentioned tail of the spring . spread it out a little while pushing down on the shoe , should slide right on
if you are using the 1.1 gauge springs then you may have to use a 3 shoe clutch tool as they are very high tension and you will more than likely end up stabbing your palm , and it hurts
hope this helps,
monty