i paid 450$ to a shop to change mine. they were very military friendly but they did screw 2 things up. they over filled it and didn't Teflon the sensor plug on the drivers side after they removed their line pressure gauge during the install. leaked everyday until i finally got pissed and wiped every reachable inch or the trans down and kept it in gear while under it and saw the weep.
i pulled a gallon of fluid and whatever leaked to get it to the right level. didn't know the TC was shipped full.
so i guess you get what you pay for but a 8 hour trans swap done while i was at work and they kept the core till it shipped with out a gripe.
my thoughts were i didn't have the right set up to do it right, so i paid. sorry no useful install words.