Pull timing back by roughly 3-5 degrees relative between 3500 and 4500 rpm's... that is the peak torque range... starting just after 4500 you can add that back in progressively so that you have full timing back by 5500, and then push it up by a couple of degrees up to 7000 rpm's...
If you have the JandS hooked up then knoc (pun NOT intended.. this timing map shouldn't knock.. doesn't for me) yourself out... these are the absolute timing numbers relative to TDC that I ran/run: 500 - 12, 1000-15 1500-17 2000-22 2500-28 3000-30 3500-27 4000 - 26 4500 - 27, 5000- 29 5500 -30, 6000-31 6500 -31 and 7000- 32
Then there are various correction factors for temperature and boost etc to modify those numbers...