To switch from a 727 to a 904 and pick up a .15 is good but how much is the cost to do it? I had the option last year to switch but I didn't just because I had a fresh converter but need a good trans. the 727 was cheaper than a 904 but than I had to buy a $1000 converter was worth it to me.i have a friend that love the 904 but couldn't get a good one built for a low 10 truck so now he running a 727.