4.0 no spark

I put a 1999 engine in my 1994 for ranger its a 4L 2wd. I'm getting gas in the cylinders my ecm has power my icm has power. The truck has been sitting outside for a year or two. any ideas plz let me know thx.

Ok, so I finally got the "beast" put together today, went to start it up for the first time and F**$ it cranked but no spark! I immediatly went through the wiring harness that I had installed and everything seems to be hooked up correctly. I did notice a ground wire that wasn't tight so I...