[bobcowan]

A stock starter for a late model 5.0 is a high torque starter. You can buy one from autozone or advance for about $100, with a lifetime warranty.

Now, that being said, that may not be your problem. If the engine used to start fine, but now it doesn't, maybe the starter is not the issue. Do a load test on the battery and see what happens. Then take a close look at all your connections. Make sure they're all still clean and tight.