Installation got a little tougher. Pulley set up (static pulley and new pulley)was kind of confusing. Plug wiring didnt work as directed. Wired from the back over top of manifold. Got the wrong manifold the first time. Manifold fit was tight, had to work it into place. Took 5 evenings. I took my time. The car has much more torque. I am going to give Jim Goodrow my changes to the directions. Might help the next guy.