Update: cut the 4 bolt downpipe flange off the downpipe, welded a small piece of pipe, and then welded on the vband flange. For anyone with the T78 kit wanting to do this, you have to cut back the downpipe to just before where it finishes its final bend, otherwise the downpipe is about 1/4" to high to go straight into the turbo outlet.
Check out the fitment now
Cut and tacked together, vband and hose clamps holding everything in place:
Half way there:
Complete (there will be no leaks on this vband:
Now I just have to rewrap the downpipe and coat it and the turbo with DEI high temp coating.
I had no idea that the normal heat wrap just disintegrates after its been run for a while. It was literally turning to dust during removal.