Jamo,
My 69 T.C. came with a flat tappet cam in it and I have never had a distributor gear problem or any other problem except the spun bearing. My engine builder told me to stay away from roller cams for mostly street driving and said with the roller rockers I would only lose about 10 - 20 horse over the roller cam. After he did the figures and then ran it on the dyno, I actually lost just 14 horsepower. And as Mike said, adjust them once a year and spend the rest of the time enjoying it. You aren't going to miss 10 - 20 horse out of that 600 + anyway.
Ron
