1980 300cd will not crank
 

this weekend, i just changed my motor in my 300 cd with another motor that has been sitting for years. my car was an automatic and i changed it to a manual. the two motors where the same, the only thing i had to unhook was the neutral safty switch from the automatic trans. after all that work, i tried it, and all it would do was turn over and over and over. i put the injectors from the old engine, and it still wold not crank. does any one have any ideas that i have over looked? email me at tsmorrow@yahoo.com so we can talk about it please.