Car cranks but won't turn over?!?

[Stang_Crazy]

This weekend, I finished putting my motor back together. Go to start the car, nothing. It will crank and crank but doesn't want to turn over. I re-installed everything exactly the way it was when I dis-assembled it but I guess I missed something.

Could a bad TFI module be causing my problem? I replaced the TFI over the winter but when I changed it, I put the dilectic grease on and didn't tighten it to the distributor right away......it was probably a month before I remembered to tighten the TFI module. If the dilectic grease was sitting on there for that long before tightening the module, would it go bad? Can dilectic grease dry and become hard?

When turning the key, I can hear the fuel pump so it's not the pump. I don't think it's a prob. with the distributor either....the dist. matches up with the marks I made when I removed it.

These are the only things I can think of...I have checked and double checked the wiring and grounds. Does anyone have any ideas why my car won't turn over?