I bought a new battery cable today because mine was pretty corroted (sp?) and nasty. I went to see where it connects to under the motor and it's like tucked up under where the oil filter is... is there some trick way to get that bolt loose?? It looks pretty tough
No trick - just wiggle up under there with the right wrench/socket. Be sure to clean things up as much as possible - bolt threads and the underside of the bolt head - so you get good metal to metal contact between the cable and the block.