I too had my trans built by TH, so I also know it can get spendy, and I also that it is worth every penny.
And an open diff, even if it is a bit stronger, still sucks for anything but daily driving.
And You can get rebuilt trans for less than $900 on EBay.
I got mine for $150 off EBay.
So I stand by my statement, the Roush prepped trans is not worth it.
Besides if he is going to go with a 3L,
he's going to want the trans fitted with an LSD,
So the trans is going to be opened up anyway,
might as well update/upgrade the internals,
so it won't matter if its a new or used trans at that point.
So start with the cheaper option, used/rebuilt from EBay.
