the capheads (3 off) will be tight, spray with penetrating oil. you can get to those but the one one the lower back is a real pain. they will most likely scream when you undo them (squeal sound due to being dry), but make sure you have the "alen key" fully home before trying to undo. I used a ratchet and long socket key when i did mine. you can get away with a small normal key socket but you might require some adaptors and uj's to make is slightly easier.
the oil lubrication pipe is easy to remove but dont lose the washers, one side is hose connection i think but remember to fit this back when reinstalling as the oil flow through is very high.
Allow a day to do this and plenty of breaks as your arms will ache and you will be lying across the engine to reach and through tiredness and frustration.
Turbo removal might be an easier option but take the air intake off up to the turbo for maximum clearance. the only way is for you to delve in and see what options you have. either option will be fiddly. the turbo connection might be slightly easier as it is 4 nuts? and one will be with limited room.
just jogging my memory back to repairing my mk1 4 times due to head failures
