Chevy 3.4 diffrences between 2000 and 1999

Can I replace my 1999 engine (head gasket blew after intake manifold gasket) with a one from Venture 2000 year model? Mechanichal parts should fit, but how about electrics? btw. Intake manifold repair in Finland was 1800 Euros, Head gasket repair 4000 Euros (4.400 $) an used warranty engine 2.500