Adjustable UCAs

[spanky the wondermuffin]

to clarify-are the 68 f-body arms available with:a-steel bushings,b-aluminium sleeves,c-aluminium cross shafts?do you stock the parts to make up a set as described?can i get the howe upper bj in standard height and also get the extended stud to try later?.don't want to make too many changes at once.thanks,jon.