Rear Axle Drum to Disc Upgrade

Hi all, I am a new member (living in USA) with 87 RHD Defender 90 I am currently refurbishing and updating with a number of changes.
I am looking to upgrade rear axle to an Ashcroft limited slip diff and convert to disc brakes at same time as doing a 2 inch lift kit and fitting new HD axles etc
As I am in the USA I have almost no access to good used Defender parts but can get Discovery ones.
My current rear axle is Serial # 22S22655B.
I have found 2 Discovery bare rear axle housings for sale here.
1st.- Is listed as LR Part# FTC3437 and suitable for 99 Discovery I model VIN numbers beginning with SALJY + Discovery II models beginning with SALTY
2nd - Is listed as LR Part# TVI100150 and suitable for 99 Discovery II model VIN numbers beginning with SALTY.

Will either of these work as relatively easy replacements for what I have today and get me caliper mounts and disc brakes ?
I have some fabrication capabilities but to save time and hassle would like to go the replacement way if I can vs modify existing as I have seen on the forum.

Your thoughts and input appreciated

Welcome aboard. Post your question in the defender 90/110/130 forum and some bright spark will help you out.

Welcome to the forum. My 1987 90 has a Disco 1 rear axle. It works and gives you the discs
Edit: I didn't fit it myself so I don't know if it requires any modifications!

Welcome to the forum