Yeah he mentioned the difficulties of getting the stepped pod dimensions correct in relation to the engine height as a step will change the way the boat performs. His thought was that he had seen many of these boats converted with a stepped pod and a full extension pod and the extension pod was always the safer bet in relation to performance.
In response to your advice above, i am actually planning to basically extend the hull much like the conversion found here
http://www.classicmako.com/forum/top...archTerms=mako
Essentially the existing transom will become entirely redundant and will be cut out with the stringer/floor structure extended into the new pod/extension. This extension will be a perfect area for batteries/oil reservoirs etc and will allow for a totally different rear combing set-up, transom door etc.
Lots of planning first before getting stuck in. this is the most important stuff!