It sounds like a very good deal to me.

$2000 for a running GT.... hell, I would buy it just to flip it. I would want to know exactly what was done to the engine. What kind of crank, rods, pistons and where was it done? Having forged parts put in makes me think they would have done head work or put on PI heads. Mabey someone on here can tell ya what to look for to be able to tell. I am a 4V guy so dont know a whole bunch about the 2V engines. But a fresh motor and trans is a plus in my book.

I would listen for TOB noise, drivelin clunk (does it have gears?) and see how it sounds on a cold start up. I would also pull each plug (when engine is cold) and inspect them to see how each cylinder is running and to make sure none are stripped out.
Also slip the clutch a bit from a start and see if it pulses or is on/off grabby. That will let ya know if the flywheel is warped. Check the rad support to make sure its not tweaked and also check the torque boxes to make sure they are not torn.
Hope it helps ya.