Hard first start of the day hot or cold.

Every morning my 73 Dart Custom takes a bit of cranking to turn over. Nothing crazy, but a solid 5 seconds to get going. Doesn't matter if it is hot or cold, just if it's been parked for more than a few hours. However if it's a restart, she starts right up.

I took a look at the service manual, but everything there was temperature related. Could it be a bad deal in the fuel pump?

Thank again
Futzy