Never heard of a Chevy or GM cam referred to as "phase 3"? Hope somebody has, so I'll learn something. I have a copy of Chevy's factory hi performance catalog from the 70's, and don't see a reference in it to that name.
I bought a Phase 3 cam from Chevrolet Performance back in 75 and put it in a 327 in my Impala. That stock convertor didn't like that cam!Back in my day (early 70s) GM had a cam we called the phase 3. This may have been a local name but if I remember correctly it was called that by GM. Is anyone familiar with this cam?