1968 383 stock cam specs

Won't get flamed from me. I've done it a few times. However, Oregon Cam will regrind them with the proper convex curve for $4 ea.

I know I'm going to get 'flamed' for this,

But, if the 'curvature' on the bottom of the Lifter isn't too bad,
you could polish the bottoms with #600 Grit Wet/Dry Sandpaper.