I didn't think that KB made a S/C that mounted to the TrickFlow intake manifold. I thought that the only two choices for the lower manifold were a stock (5.0 H.O. lower) and the Cobra (GT-40) lower.
You can get the 1.5L blower for the stock lower and the 2.2L blower for the stock or cobra, with the cobra lower being the better choice. The TW heads are nice pieces but there could be some issues with the valve covers getting close to the blower housing [requiring a spacer be used.]
If it were me, I'd get some AFR's / the Flowzilla and a custom cam. Put all of it on and then worry about splitting your block into 2 halves with all of that torque and HP from just off idle to 6,000 RPM's.....