[peterd]

I just got my replacement gear, when I talked with MSD they told me I should use a steel gear with a roller cam. My part arrived and I put it on last night this requires you drilling a second hole in the distributor shaft. One thing I didn't check in the original was that the distance from the distibutor ring which mounts flush with the block and the bottom of the gear is 4.00 inches +/- .005. The gear I took off was soft, I could file it easly and did not appear to be hardend at all. I will let you know how it goes, if the rain stops I will be firing it up today. The guy at Comp Cams also said steel gear. He also told me that a roller cam is ostempford (not sure on the spelling), it is a cast cam which is specially treated and is very hard. BTW make sure you put cam lub on the gear it will come in the box with the gear.