It also depends on what your doing. If your taking out the engine only, then using extensions can be more trouble if you have to drop the tranny down. Removable tunnel obviously makes it easier. Then again, you can pull engine and tranny (and case) as a unit, then use an impact on it. /forums/images/graemlins/laugh.gif Biggest problem with stacking long extensions is that they tend to absorb allot of the torque rather than transferring to the bolt. They also make it tougher to get a universal to work right, and the “wobbly” extensions are another option. If you are removing the tranny and leaving the engine in place, and, if you want to use extensions, I would do it like some have said. Use 1/2 extensions, they will not twist nearly as much.
One other thing to think of, you can use a box end (sometimes upside down helps to get the fork away from the fire wall) to break the bolt loose. If it does not loosen “finger tight” quickly, you can then use the extensions to get it the rest of the way out. Oh, another trick is hooking the “box” of one wrench over one “toe” of the “fork” of the wrench on the bolt. This will give you more leverage but, be careful, it can also break a wrench and mess up a hand…