Update: ok sorry for the array of possible issues but we have somewhat narrowed it down.

Everything is hooked up. Got spark. Got Fuel Pressure. BUT I heard a weird noise that sounds almost like the starter isn't dis-engaging, however the starter moves freely when inspected. I say its a grinding noise but my buddies the mechanics says its not really a grinding.... just a weird strong noise/grinding when the motor turns over. I know the motor is chill and good, but its got a new tranny. Let me know if anyone has any ideas. As of right now its a mystery that needs to be dealt with ASAP. Thanks - mil

 

could use a sounds recording.
but... if you have fuel and spark there is only 1 other ingredient..