I want to make my Redstone Chicken give off a redstone signal in the blocks that it occupies, so up to 8 blocks. I have looked at the BlockRedstoneLogic class since thats the only class i could find that handled redstone logic. I am stumped on how to pull this off since i cant call on that class.

Why not look at the existing blocks that interact with redstone (wire, torch, door, etc.).

 

IIRC there are some methods in World that look around for blocks providing a signal via isProvidingWeakPower and isProvidingStrongPower. Pretty sure there is nothing in there to check for entities, so I think you would need to put a core mod in those world methods to look for your entity (seems like a performance issue, maybe come up with a better way), then mark the blocks for update as your entity moves around so they recheck their redstone status.