alternator bracket bolt, power steering pump bracket may be hiding a couple of bolts, and/or maybe one of the bolts for the timing pointer may run through the cover to the block. i think i needed to remove the alternator and a/c-p/s brackets to get the cover off.
i took mine off a few months ago because the front seal was dumping oil like the seal was non-existent(the seal was as hard as a rock). i suppose the mental/emotional trauma i experienced while doing it blocked most of the details from memory. i do remember that unless you loosen up the oil pan so it drops just a wee bit, the installation of the cover was almost impossible without knocking the seal(between the pan and housing) out of place so i ended up gluing it and the gaskets in place. there is a part of the block casting that blocks the top of the housing from being angled into place, i think the part where the thermostat housing bolts on, that screwed with the ease of installation for me. also if the crank seal is going to be changed, it might be better to remove old one while cover is off but install new one after cover is replaced. might give some wiggle room.
what i erroneously(as usual) thought would be a 3 or so hour job took way longer and the seal i needed to change got lost in the process. spent a couple of hours looking for it knowing i wouldn't find it till too late. i ended up siliconing the snot out of it and putting it back together. as soon as i tightened the last bolt and slid out from under the truck i found the new seal sitting right there on the ground under the radiator support....good times!!!!!!.....NOT!!