4l80e build
I also prefer to internally dual feed rather than use the 3 piece plate. That plate is just begging for crossleaks. But if you don't know how to do that, or if you are nervous to try, the separator plate will work just fine. Lots of guys use it.
If you've already spent the money on the input shaft and forward drum, I would opt for spending a little more and getting an upgraded forward hub as well. Rollerized is preferred






