Some responses in this thread seem like they are from dudes that never turned a wrench.
No, the engine does not have to come out. Those that suggest it are wrong.
If the car is a 73 Dart Sport as shown in writing at the bottom of the original post, that is one of the easiest cars to do this with the engine still in place.
What logic is there in draining and removing the radiator, ATF lines, headers or exhaust pipes, fan-alternator-power steering systems, radiator hoses, wiring, fuel lines and motor mounts, disconnecting the bell housing and torque converter bolts to get to an oil pan that is at the bottom of an engine?
The 73-76 A body has a center link that can be removed easily. From there, you drain the oil, remove the oil pan bolts and lower the pan out. Yeah, you might need to raise the engine a little to clear the oil pickup tube or crank counterweight but so what? Use an engine hoist with a chain across the two frontmost intake manifold bolts or a floor jack with a block of wood under the harmonic balancer. It is simply that easy.
Those that chime in with useless advice are not helping matters.
Inertia has it right, Dano does too.
Why would you remove the distributor??? There is plenty of room.
