DIY LTCC or similar system for LT1s

[spfautsch]

I asked about Spark Reference Angle early in 2017 when I was generating a base tune for first fire. What do I put here, -3.5? Nobody seemed to know and Steveo told me I should just skew my coolant temp adder table.

The timing set is a cloyes heavy duty roller with less than 5500 miles on it, so I highly doubt the problem is slop in the timing set. If it were that I would expect to see fluctuation in the TDC signal, especially when I turn the engine backwards. The only reasonable explanation is that the trigger wheel was poorly cut.