Im new to the forums and have a trs on a 24 excalibur I plan on raising it and would also like to try an extension box. I have heard of people building them anybody know any info on this? Another tread maybe I may have skipped over?

That very thought crossed my mind.I have the resources to fabricate and machine them but the amount of trial and error would be emense with twins.Unless someone can comment???

in the classifieds, in boats, there is a magnum for sale w/ extension boxes, and all the parts you'd need to rig your boat.

if you made boxes yourself you'd still need all of the drive-line parts and hardware, and drive-line transmissions.

i've never seen tech drawings for drive-line TRS, they gotta be out there though