[willy]

I'm a little confused, can't figure out how it would not have wood across the whole transom. Mine is the exact same boat one year newer and I know it has wood along the sides of the transom because I drilled thru it to install my thru bolted aux engine bracket.
Ferminator you might want to check it out, I have a sneaky feeling you are in error on that.
Also if you decide for some reason to redo the transom do it with divinacell or marine wood, the sea cast has had a lot of problems for people who have used it..
But again if you have a sea drive boat and it sounds like you do, you will probably find it is more than strong enough for a bracket and V6 outboard. Your only concern will probably be buoyancy of the hull with a heavy outboard when rocking in a swell stem/stern. Make sure you go with a bracket that has good sealed buoyancy, and don't go with too long of a set back.
Mine for example is a V4 two stroke and though my engine has not dunked once it has come close in some heavy drift thru standing wave action we have around here. The boats I have seen and driven with a bracket and the heavier engines tend to dunk the motor more.. Just a thought.