Installing a bracket

[JohnB]

I am getting ready to install an Armstrong bracket on a 89 Sceptre that has a large hardtop on it. Balance on the boat right now is a little nose heavy with a full tank of gas, back to neutral with 1/4 tank.
The bracket is 72" wide, 30" setback, 12 degree angle, with a 250 EFI Merc 2 stroke.
Has anyone installed one, or something similar?
The motor currently is on the transom, and works very well where it's mounted. The info I can find on this, says to mount the motor 2.5 inches higher than were it is currently mounted. I am looking for CSC tribal knowledge on mounting.
I am putting a 4" u-channel to mount on the inside.
Longterm is to close the transom in, and put a live well in there, would should add some weight, and balance the boat.