Here's the problem, I have a 1970 280SL has been modified for the Euro throttle body (no vacuum past idle), no emission and the 123 distributor. I am currently using position 8 but there is not as much power as I would anticipate (rebuilt engine) and according to the information from 123, the distributor only advance 22 degrees at 2400 rpm. I think the ideal is 30 degrees at 3000 rpm. What setting do you recommend?