Will an engine from a 1996 Ford Explorer fit a 2000 explorer?

I'm not a mechanic / technician , but if you mean the 4.0 liter EFI , V6

engine , I would say ( no )

From what I have read there are ( 3 ) different engine blocks for the Ford

4.0 liter EFI , V6 engine ( which is an Over Head Valve / pushrod design engine )

( 1991 to 1994 Ford Explorer )

( 1995 and 1996 Ford Explorer )

( 1997 to 2000 Ford Explorer )