Refocusing on Austin 70.3

I'm now all signed up for the Ironman Austin 70.3.  I'm shifting my training slightly to focus on this as my "A" race along with the Dallas marathon.  I feel like my marathon training should have me in good shape for the run portion.  I need to focus on ramping up my swim and bike.  I'm following a training program from a training book I got.  I think it's working pretty well.  I guess the race will tell.