I cut mine off for headers too but haven't gotten to alignment yet. The bolts are rather short for any drastic shimming needs. Might be a good excuse to go to tubular upper arms for better handling and less shims now...
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Mitch
67 GTO...Gulf Turquoise w/Black bench and 4 speed...

Follow the resto in pics here...
http://s1357.beta.photobucket.com/us...28454765976114
67 Camaro ss/rs 350
66 Chevelle SS 396
70 Chevelle SS 396