My tips having done this two months ago:
Loosen rack clamp bolts inside car. (remove nuts)
Remove steering column, (remove wheel, cowl and indicator bits if desired)
Have the whole car on stands (with good wood planks between it and each 'corner' of the body work.
Put a jack (trolley is best, more stable) under a wood plank across the bottom of the subframe just near where the lower arms are. Be sensible and make sure you don't push up on anything but the subframe. In my case two 'spacing' pieces of wood screwed to the cross piece to clear the gearbox extension made it easier.
Remove front wheels
Undo exhaust / extractors
Remove tie rod ends from steering arm (scissor splitter if you want to use them again, or just cos they are easier)
Remove subframe bolts under floorpan
Undo the top subframe bolts
Loosen front subrame bolts
Make sure you won't damage carby, manifold, radiator, hoses, etc etc.
Check again cos you will probably forget something
VERY carefully lower the rear of the subframe down, about 2 inches. BE CAREFUL AND CHECK WHAT YOU ARE DOING.
remove u bolts,
slide out rack.
slide in new rack
The u bolts sometimes will need closing up in a vice to match the holes.
Put u bolts in (this will involve swearing, sore knuckles, and a punching bag nearby is best. Be prepared for doing this for several hours. Have a lead light and something comfrotable to sit, crouch, lay, pray and beg on.
Reverse procedure, again being very careful.
Don't forget to get a wheel alignment after, but to start with, measure the thread distance inside the old tie rod ends and duplicate this with the new ones, count threads etc. But this assumes same type of rack and same type of tie rod ends. You will still need the wheel alignment.
Enjoy!
Oh and If you stuff it up don't blame me. It's mostly common sense, so think about what you are doing and play safe at all times!
