gill bracket ?

[fandtm666]

I have been looking around for measurements on a design for a bracket similar to the single engine Hermco.

does anyone have the measurements by chance because i have read so many different idea's on how much higher
the motor should be mounted once the bracket/pod is installed.I will have a 75-90hp long shaft mounted when done
so the normal mounting would be at 20inch but i am confused as to what height it should be once the pod is mounted.

i have been toying with the idea of building mine to extend 60cm/23inch from the existing transom so i can get some deck space
and add some extra flotation with the added pod.

thanks

666