And 10 degree locks aren't needed for most engines. Matter of fact, the steeper taper of the 7 degree locks holds them in tighter than the 10 degrees.
10 degree locks may be useful if you're running huge springs for a solid roller cam, to avoid the locks actually pulling through the retainer.

Here's an old thread: https://board.moparts.org/ubbthreads/showflat.php?Number=5735698

R.