Hey guys, Thanks for all the replies. Tony thanks for the VA write-up. I checked and I am connected to manifold vacuum on my Edlebrock 750 carb with a an Edlebrock proformer manifold. I do have a steel empeller on my water pump and I did reduce the gap between the empeller and plate. My hoses look good.
How do I check total timing? How do I check when it comes in? I do have some knocking/detonation under load. My distributer is a GM HEI. I set my initial timing to 6-8 deg. before with the vacuum hose plugged.
I have a new fan clutch but I could try running without it.
