As a starting point I would use a stock Vortec 350 timing table. I posted the timing table for a 1998 Vortec 350 here: http://www.gearhead-efi.com/Fuel-Inj...-Throttle-ONLY!
As a starting point, you will likely need to add about 20% Acceleration Enrichment (AE) both TPS and MAP. I strongly recommend using a Wide Band O2 sensor to adjust both AE and Power Enrichment (PE). Here is a tread I posted for WBO2 tuning: http://www.gearhead-efi.com/Fuel-Inj...29-Spreadsheet
dave w
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