I have a crate L31 ( Vortec Head 350) with TPI induction, running on ARAP bin with 1227165 ECM. I've been running for years now with the stock SA tables, and am just finding out that the VORTEC heads prefer a lower SA. Currently the Maximum SA scalar is set at 42 ( stock), Base timing and Spark Reference Angle Scalar is at 6 degrees, and the SA tables show MAX spark advance in the 48 range. Everything I can find on the net indicates that Max SA should be in the 30-32 range.

Anyone had experience with this? Maybe someone has a BIN with a Spark Advance table already re-set that might give me a jump start? I assume that I need to reduce the Maximum SA scalar to something smaller, like 32?? And then re-set the SA Tables ( From 20 min as shown to say 32-34 in the highest regions, and then smooth out the curve? Any other table changes I should also consider?

This is foreign territory for me, so any help would be appreciated.