Really? That is unusual. If you look in that catalog, you see in the slant six cams there WAS an RV-10M. That's what I THOUGHT happened. Was that it got mis-stamped. But, I am SURE there could have been and probably was an RV-10M cam for the small block too. It sure looks like it's worn very well, so I am sure it's a mechanical cam if the lifters are mechanical. Do you have a dial caliper? If so, here's what do. Measure the lobe from base circle to peak. Write that number down. Now, measure the lobe from the SIDES. This is the base circle. Write that number down. Now divide the base circle number by 2. Now subtract THAT number from the total lobe number you got the first time and that's the lift. We can zero in on that beeotch from there.
