Update:
Got the e-fans in and are working flawlessly. Been chatting with Ezdaar a lot on what other mods to do and we have come up with a whole bunch of awesomeness.
The plans now are to do the NNBS 6.0 top end with my NBS 5.3 bottom end. I am almost completed with collecting parts for the intake manifold swap/injectors. Then I will for sure need a transmission, so I will be swapping in a built 4L80. Capable of handling 1500hp (no I will never be anywhere near that, but because of the weight they recommended that one).
After that I will get a set of ported and polished/milled down 799/243 heads off of the NNBS trucks. Might also get bigger valves cut. I will also be getting a more aggressive cam to match the new intake manifold and heads.
Then the last stage will be boost. I will be going with a turbo from On3 performance.
The manifold swap should be about 30whp after tune. Heads/cam should be another 50+whp. So n/a I should be around the 450-500hp at the wheels.
This will be a pretty long process since these "stages" are pretty expensive.
Now for manifold/TB ****: