[MReid]

As above, however base timing is important also. Most distributors can have the timing curve calibrated through the use of springs (determines how fast the timing comes in) and bushings (determines the total advance). Ford's recommendation is a start. The specific performance of your engine in your car may vary and you can experiment with the timing to get the best performance with no detonation. I have a Ford 392 in my Daytona Coupe. My base timing is 12 degrees and total is 34 degrees at 3000 rpm. This is the set up that gave me the best performance.