Engine Swap/FAILURE

My grandpa has just recently finished off his 4th motor(still using 3rd samurai) he tried to replace the motor, it ended up uncessful. This isnt his first replacement and hes a pretty good mechanic. I dont know the particulars on the replacement motor but his was a 94 samurai J(L?). I will have more info latr but wondered if anyone could help. He got it all together and it wont run. He has gone over the checklist of procedures a dozen times but cant quite figure it out. Any ideas would be helpful.

exactly what are all the sypmtoms ie. what is it trying to do when u try to start it. is it cranking at all? ect.