Thanks for the info!
I did some addtional investigation and it seems people are speculating that the die hard auto and marine batteries are very similar, if not the same on the inside. cca/reserve capacity/Ah ratings all line up. Sears even lists the auto DHP battery as a deep cycle.
If thats the case then I'll just get another standard auto DHP in the same group size for both simplicity and the extra year warranty.
'97 lx450, 170k, factory lockers, ome 850/863, 285's, 4 working doors(1 more than the old fj55 )
'74 project pig (sold