SU Carbs

[TomRJade@aol.com]

Hey guys,
When I received my SU HS6  carbs from a friend he had replaced the stock 
needles with "doctored" ones for a more Hi -perf. motor. Once on my car, I 
find that my motors runs rich even after fooling with the air/fuel mixtures 
10 ways from Sunday. My question is this: How hard is it to exchange the 
needles? ( I have the original ones.) and do I need any special tools to make 
it happen? Does anyone have a diagram they could e-mail me? and/or do I 
really even need one?
Thanks
TXR-74