1997 and 2006 ford lower intake manifold and engine swap
 

I have a 1997 ford f-150 with a 4.2 engine. and I have a rebuilt 4.2 engine from a 2006 freestar van. Can I install the engine in the 1997 ford f 150 if so what do I need too change since it appear that it's a few external engine connection that isn't compatible. The lower intake and upper plenum seems to be the problem, Please help me make this engine work...