I think you are talking about a torx head bit... I had probs with this, the bits would bend ant twist under torque... Sears don't sell a large enough bit, and the autoparts stores all sell crappy ones that break, however Kragen autoparts(and their affiliates I would imagine) sell the bits that are strong enough and get the job done right. You will most likely need to loosen the cam shafts to get to those bolts, and MAKE sure you have bought new head bolts, they aren't reusable. If you need any more help just ask, I've done this job and know what you are going through!!
