He failed you for a bushing? Anyways, i dont think we have radius arms. I mean, theres the trailing arm, lower control arm, upper arm, compensator arm, and sway bar. No radius arms... But unless your car is rust free and everythings nice and neat back there, i wouldnt really recommend doing it yourself if your not too experienced. Depending on what bushing hes really talking about, you'll probly have to use a torch just to get the damn bolt loose and then press out the bushing somehow. I dont want to discourage you though, its always a good idea to work on your own car so you get to know it better. Plus, to me, its fun.
__________________
ZC stuff
http://dh-racing.com
http://www.thezcr.com/html/zcbook.php
http://dmoore.com/crx/zc.htm
http://www.jgenginedynamics.com/HOME%20PAGE
http://www.theoldone.com/