I'm closing in to having everything I need for my TPI swap and a thought just came up. Which engine should I set the timing for: TBI or TPI? Since I am using the LO3 engine that came in the car and swapping a TPI system on it shou;d I go with the 6 degrees advanced for the TPI or use the 0 degrees that TBI uses?

 

6

 

set timing according to the TPI spec. Your compression is not any higher, so setting lower wouldn't help. I'd start with 6, bump 7, bump 8, see how it acts.