Removing alternator from car

My wife has a 1993 Mitsubishi Diamante. The alternator went out & I decided to replace it. I am a marine technician with over 10 years experience so this ain't my first rodeo. I have the alternator off of the engine but cannot remove it from the car. It appears that the lower alternator bracket needs to be removed to let the alternator come out from under the car. The problem is, this bracket is way over-engineered. On the outside of the bracket, the oil psi. Sender screws into an oil galley which runs thru the bracket & into the block. The bracket is held on by 2 bolts on the front & 1 oil pan bolt from the bottom (and 1 timing cover bolt). I removed all the bolts & the bracket wouldn't budge. I assume that the oil pan now needs to come down to allow the bracket to "unplug" from the block. I have checked 2 library's & as many manuals as I can find with no luck. I want to make sure I am barking up the right tree before I go & pull the oil pan down. Please let me know if this is the right way to remove the alternator or not. Also, any diagrams of that confounded bracket/block would be greatly helpful. Thanks for your help.