I am building a D16Z6 for a 93 Si Hatch. I recently had machine work done including dropping in a Comp 59300 cam. With the cam gear and key slot in the up position, the distributor will not slide into the cam slot. If I rotate the cam 180 degrees, the distributor will slide in. I pulled the Comp cam and put the stock back in and with the key slot and cam gear in the up position, the distributor slides in and is at cylinder 1. A side by side comparison of the Comp and stock cam shows that the offset for the distributor on the Comp cam is opposite of the stock cam. I sent the Comp cam back to the company for an evaluation along with this picture and they called to tell me there is nothing wrong with their cam and will be sending it back. Even though he couldn't explain the difference in the offset. As you can see from the picture with the key slot up on both cams the Comp cam is offset to the left while the stock cam slot is off center to the right.