Is this a direct swap and will I be able to bolt up a TPIS 90mm TB?? I have cable TB.

 

The LS2 throttle body is electronic, not cable. If you want a 90 mm cable activated throttle body, Fuel Air Spark Technology (FAST) has one, part #30-54008.

 

I know that the LS2 TB is electronic. My question is will the TPIS (Ive heard fast TBs have problems) bolt up and will the manifold bolt up without modifications.

 

Now I know what your question is, the LS2 intake is pretty much the same as the LS6 except it provides the clearance around the sensors that have been moved and the TB is slightly angle up to reduce water puddle in TB. Here is the site I found about the LS2.