It does decrease steering radius a lot. Not sure how much (or how to put it into numbers), but a lot. Stock type steering keeps turning until it hits a stop on the control arm. A rack and pinion can only turn as far as the worm gear can go inside the rack... and being the G-bodies need narrowed racks to keep bump steer to a minimum, it shortens the radius a bunch. Some people do go with stock style early Camaro spindles combined with our aluminum steering arms which have a set of holes in them closer to the spindles, which does give it more steering radius than using a stock G-body spindle. But to do that, you'd need control arms custom built using Camaro ball joints (and not G-body ball joints), adjustable upper control arms (like our PRO version) to help with the angle difference of a Camaro to G-body spindle, a bump steer kit to attach to the steering arms of ours, and early Camaro brakes.