340 Static Compression Numbers and Test Procedure

Mattax said
Going from that old thread, base timing of 17* was set at 1100 rpm.
Unlikely that's enough advance with your engine. By 1000 rpm, it should be up around 20*
If it was 17 or 18 at 600 rpm, that would be OK starting point assuming it starts advancing before 1000 rpm.
Just MHO

Hot off the press I just measured the actual curve in the car. May need to increase the timing at around 2700 that dip does not look great. It also maybe the data is not that great right there.