454SS tuning

[Fast355]

Pretty sure base timing is 4*.

After 4800 it runs the last cell it was in.

I am fairly certain that a TBI big block runs 4* base ignition timing as well. TDC would be correct for a 4.3/5.0 or 5.7 TBI. TPI applications ran 6* base. 60*V6 engines mostly ran 10*BTDC.