I've copied / pasted a 1998 Vortec Timing Table from EFI Live into a Microsoft Excel spreadsheet. I've adapted the (Black Box Computer) factory Vortec timing tables for other GM ECM's / PCM's for a SBC TBI engine that has been updated to Vortec heads. I've only posted the FACTORY BLACK BOX COMPUTER TIMING TABLES for Open Throttle and Closed Throttle. In Total, The Factory Black Box Computer has 21 Timing Tables and Spark Parameters!!!!!!!!!!!!!