I have... the one I just pulled out of my Challenger's engine had to be installed +8 on the gear set to actually end up +3 on the ICL (i.e. 5 degrees retarded).
I installed & mapped the profiles of that Comp, an UltraDyne, a Bullet and a Lazer in my engine while it was still on the stand and the ONLY cam that was ground correctly as far as "straight up" phasing was the Lazer. The Bullet was the worst and the the Comp and the UltraDyne were about equally off, but in opposite directions.
