The initial and the mechanical which i have it set at totals 36 degrees and is where i would like to leave it.Now to get the total which is equal to the initial +mechanical +the vacuum advance if your a running a vacuum advance canister which in my case adds 20 degrees at the crank which is non adjustable.So my total is 56 degrees when it is all in at 2500.(20 + 16 + 20)= 56 degrees.I do not know if this would be to much timing(56) .So its limit the vac advance with a screw, plate or what ever or go to dist that has an adjustable vac.Or if 56 degrees is not to much leave it alone.I just read what rustyratrod wrote if 56 degrees is not to high i should be fine.Never could find any thing on this