I took my 964 to AFN Chiswick and they claimed that they could not remove the wheel as the nuts were stuck. They would need drilling out.
yes, i've had stuck nuts .nothing you can do but drill them out .it's the labour that costs as the studs only cost about a tenner. --sorry craig A. - 13th March, 2001

and use copper grease when you put your new nuts on - Rob F - 16th March, 2001