I posted the Ford mesh pattern from the Shop Manual back on Page 5 of this thread. But, FWIW, the MSD APS starter instructions for the Ford FE call for:
INSPECT PINION GEAR
After cranking the engine several times, you can inspect
the witness pattern on the pinion gear. The pattern should
show 1/4" to 3/8". If over, the internal shim is required.
http://www.jegs.com/InstallationInst...1/121-5093.pdf