You could use the 'book' lower rear wishbones as they are and make eccentric (I think thats how it spelt ie off centre) top hat bushes to give you some small adjustment. This is some thing I've discussed a few times with people but am not sure if it would work with out having a rose joint on the top arm instead of using the current set up. I know the MX5 has this set up but then again it uses rubber bushes which have considerable more give than poly bushes or nylon. One trick to getting the brackets correct is to tack a bar across them down the length of the chassis about a meter long, and messure the gap between the chassis and bar. If the gap is even down the length of the bar then the brackets should be straight,make sense?
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