Appropriate timing curve

Good luck with that. The srtmax is an annoying cam when you have the complete controls of EFI to tune it.

Total timing depends on a lot of things. Assuming you have good exhaust, good plug gap, decent pump gas, and consistent fuel delivery......25 should be a good all in number in your setup.

I would setup the timing something like this

1500 - 17
2000 - 19
2500 - 21
3000 - 22
2500 - 22
3000 - 23
3500 - 23
4000 - 21
4500 - 21
5000 - 23
5500 - 24
6000 - 25