I have one of the 3 prong gear pullers that you can flip around and pull from the inside as well. You're welcome to try it if you want.

How big is the hole? If it's 1" then you might be able to put in a t-handle boat plug and expand it and try pulling it out.

The hole is around half inch

You're 4.8 truck motor has a pilot bushing in it?

No bearing, because I put it in

I have a lifter puller, the slide hammer type but it might not be small enough to it there.

the one in there now is the wrong one?

It is now

This would need to be ground slightly but for 17 bucks give it a shot. http://www.harborfreight.com/3-jaw-p...ller-4876.html

thats the exact one i have, and modified.

thats what I did for mine lol it worked perfectly

Once again, you don't have an LS-based engine.