VW JETTA: Can you swap an AVH/AZG (2001-2003) engine into an AEG 1999-2000 just by swapping the older AEG harness and Manifolds onto the newer AVH/AZH engine?

Searched SEARChed and SEARCHED, then Posted a topic on VW Vortex but still not REAL answer.

Kinda need info ASAP since I need to order an engine this week!

Thx in adv.