[xeroinfinity]

Make sure you get a manual! And good torque wrench.

Its not really hard to change the LI gaskets, but it is time consuming. I'd giv your self a good day(8hrs) if you hav not changed these before. Alot of the things on top of the motor and the front hav to come off.

Most important thing is to get the GM gaskets with the metal rings around the waterjackets, these will last longer than even the most expensive gasket set, I know from experiance.

You say its leaking from under the TB? You sure its coming from the intake and not the TBs coolant line down there?

Just making sure, they do blow out there around where the intake and block meet along that flat surface.