6.4 Hemi Trucks

my 07 6.7 g56 qcsb deleted and straight piped with a smarty gets 20s empty, now days it seems these trucks are lousy till you can delete the emission crap, i believe the 6.4 is a mid grade burning fuel engine, the 4.7 is the only e 85 flex fueled engine, my guess is if your a hot shot service the 6.4 wont last as long as the diesel, but for everyday driving and occasanional pulling the 6.4 is the way to go