The bravo to arneson in short is not just a bolt on...... you have to reglass the transom and possibly fill in the notch, move the motors around. It's about the same work as putting on 6's, and 6's will handle more power than the arneson conversion (asd6's and 7's). Also, the bravo conversion from arneson has a deep skeg on it. Not sure about the asd 8-10's...... Those either have skegs or fins on the sides.
Also, we have Bam and Huber trannies. We think we like the bams better because they have a deeper sump, and if the pump looses pressure, the bams recover more quickly.