Cant get my newly changed 3.0 to start

I just changed my sons 2000 3.0 engine with a 2001 3.0 in his Ford Ranger. The 2001 was running before I removed it from the donor truck. I broke a vacuum line on the back of the intake manifold when reinstalling so I swapped the intake and throttle body. Everything else was a normal engine swap but the engine will not run. It turns over and will start with starter fluid but will not stay running. Could this be a bad intake gasket, bad throttle body gasket? I swapped the computers incase it needed to be flashed but still no change. Turns over, wants to start but just wont. Any suggestions will be extremely helpful.

Regards,

Keith