i had the same prob, i just used a hammer and chisel, i kept shocking it till it started turning, then i just threw the spanner on it and come of with ease
g'day
just wondering on how to get me hands on one of these memcals, thats if u have any left.
my car is a vn 1989 model series 1 3.8l. if u need more details let me know.
cheers