For turbos I'm using two KKK series K14 units, which are T25 size and mounting them directly to the exhaust manifolds with homemade adapter plates. It's convenient that these engines come with Fenton like manifolds and with the Ford's port layout you can mount a front manifold on the rear 3 cylinders, so both outlets are parallel. A little modification is required to bolt the rear one up.
I drilled and tapped another hole in the head under E4 and used a stud with red high temp locktite as the hole goes into the water jacket.
