engine hieght on bracket

[hugo]

This is for those of you running a bracket on 20 footers?
So i know the rule of thumb in 1 inch up for every 12 inches back, but i think i remeber seeing somwhere that seacraft hull desighn actually likes the motor a little higher whether it be on a bracket or on a regular transom. So i was hoping some of you guys with brackets could give me real numbers on your setups.

I just finished my setup but havent had it in the water yet and wanted a good starting point for engine hieght, i have a 20 SF with 26 inch set back bracket. I was thinking 2.5 inches but i think somewhere i saw someone was running 3.5 inches up with good results. So what do you guys think?