So, I have the date soft set for July 4th to do the engine swap. Looks like I'm looking at

Fel-Pro LIM gasket MS98014T
Dorman 47065HP coolant elbow
Oil Pressure Sensor - just replaced it, so I'll pull that
Water Pump gasket
Swap over all sensors

Does this seem pretty comprehensive of what I need to do or is there additional maintenance that is recommended once you're at this point? I really don't want to be kicking myself later on for not tending to something easily accessible with the engine out.

What is the general concensus on engine/trans mounts? Do they need to be OEM if replacing?

i would replace the thermostat and rad and heater hoses, not terribly expensive and saves you from having to drain the coolant again

Matt, the majority of the time, the front trans mount goes bad and the others are fine.

Ok guys, what'* the opinion on changing the Rear Oil Seal as well as the gasket for the Rear Housing? I've seen some posts where it'* recommended. However, my manual calls for the use of the J38196 Rear Oil Seal Installer and J41349 Rear Cover Alignment tool.

First - Should I do the preventative maintenance, or is this a can of worms?
Second - If it is advisable to get into this, are there good work arounds other than buying the specialty tools? I've already checked w/ local parts stores and they don't have them on the loaner program.

Thanks

Sorry for resurrecting this month old thread, but just wanted to post an update. Took a week off and did things nice and slow. I must admit that wiring was the greatest PITA out of the whole project. I'll pull, clean, scrape, install, or anything, just don't ask me to reroute the wiring harness. I probably took 30 pictures to refer back to, but still had to go find two strangers to ask if they would mind me looking under their hood.

But, the engine is swapped out w/ new LIM gaskets, Dorman aluminum elbows, etc. Went w/ Fel-Pro on all gaskets and I'm SO impressed with that company. It seemed like any kind of gasket or O-Ring I might look for was included in their kits. Kudos to an American company that gets it right!! While I don't want to replace THESE gaskets, I look forward to installing more Fel-Pro products in the future.

I'll start a new thread with a question I have from this engine swap dealing with Dropping Oil Pressure at Idle, but I'll close out by saying the swap was a great success and I love driving my Buick again.....Oh, and BTW....I swapped in my old LIM from my old Bonny since the Impala'* was gunked up w/ old Dex. So, it'* also nice to have a piece of my old 96 running w/ me!