machine the bearing collar so the halfshaft goes further into the diff no!
machine the face maybe as long as the wheel stud has enough meat on it where it presses in
question why bother fitting a atlas?
in my eyes unless you running big bhp 200+ or plan on fitting a yb or torquey v6/v8 or massive wide gripy tyres it seems alot of effort for no real gain. atlas parts are over priced, lsds are far more expensive than english units and there isnt really much of a selection of cwp's unlike the english that has lots. narrow atlas halfshafts are quite rare unlike common english units, atlas axles are very heavy compared to english axles which will make you 0-60 worse an mpg worse by the time you have faffed about sorting out the halfshafts cutting of the saddles an repositioning them to fit a escort messed about getting the handbrake assay to fit/work. narrow atlas's have a 3.09 diff as standard so you will need to buy another cwp then have that fitted what is a pain in the arse so £150(axle) £80(cwp) atlas rebuid kit (?) and about 2 days labour fitting everything up. a english complete diff will cost no more than £150 for a desireable ratio like 3.77 it will take 2 hours max to change job done i know what i would do