all FBO does that mean distributor as well ,? that may be part of why you are not pinging , put in a stock distributor and see what happens . i'm having a distributor done by them now hope it helps
Nat I did have Don @ FBO custom curve a distributor for my engine after I had issues with the tune and yes it did help.
If I remember correctly
16* initial + 18* mechanical advance = 34* total all in @ 2600rpm
Plus 10* vacuum advance
This engine was dynoed at 35* with no ping on 91 octane pump fuel.
One more thing, from the start I have run this engine with a large capacity, high flow cooling system with a 160* high flow stat.
When I pulled the plugs yesterday after 2500 miles they looked perfect, I put them right back in. Before anyone asks they are Autolite 63 plugs.
