Can't be done. Can't even get a T45/Tr3650 out with Long tubes.
The 2V and 4V have different angles on there heads, and I know the 2V heads are on more of an angle than the 4V making it even harder to install the headers themselves. I know a guy with a 4V Cobra motor that removed his T56, and installed a 4R70W by cutting off one tab on the passenger side of the bell housing to clear the header. BUT...his headers were Stainless Works L/T's, not BBK, not MAC, not Kooks.