At the risk of repeating others, your exchange should pretty much be flawless except for a few things.

it sounds like a change between an auto and a manual. The mounts are going to be different, and you want to take special note of how the drive shaft hooks up. I have never phsycially made the swap or needed to do much work down there other than to replace the tranny seals on an auto, so I can't tell you exactly, I just recall being made aware that there were some subtle differences at the time. The 82 as also designed to carry the 4spd with the overdrive-which I always preferred to the 5 speed box- so take a good look at the diagramm in a manual, and double check for any subtle differences, such as in the shift mechanism.

The differencial between the auto and the manual are different, so you might want to change the pumpkin.

The AC will be different in the 88, so you need to be aware of the new locations you will be hooking up things like the receiver dryer. You have a different power steering pump.

I am not sure whether this particualr 83 has the LH2.0 or not, but you want to be sure the mounting points are there for you for the slight changes.

While it is true that these cars remained very consistent throughout their lives, and even inherited some thigns from previous generations, they do have differences you want to keep your eyes open for as you move along.

sort of an aside, I did have a friend who hooked up an older b23 to the 2.2 LH, and apparently it blew the doors off. Something about that combination was very powerful.

Good luck.