Far easier to do off the car you will need the clam type splitter do not use the wedge, more likely to split the rubber seals. 20mins
Plenty of wd40, a vice, a pair of 18" stilly's.
measure from the end of the clamp barrel to the centre of the track rod. (re-set to that measurement)
remove the bolt from the clamp, tap a chisel into the clamp to spread it slightly, place on the vice with the jaws slightly open. gently tap the barrel whilst turning, again plenty of wd40, you have a left & right hand thread.
Under no circumstances should you use any heat, you are dealing with probably the most important parts on the car in terms of safety, when you apply heat you alter the temper of the steel after which it is down to pure luck. People who have to apply heat have no understanding of what they are looking at. so unless you are fully aware of what you are doing heat is the last thing you should think of. The tracking both front and rear on the Omega are well engineered, and a pleasure to work on. 20mins
Reassemble reset tack rod ends to the measurements you took initially. back on car job done.
from memory 17 & 19mm socket and spanner. 20 mins
Not a lot more to reset your tracking and camber, but thats another subject.
Take you time and good luck allways plenty of peeps on here with advice so you are not alone. But anyone offering advice to apply heat just have a chuccle to yourself and move on.