hi, If no room on bottom arm, then shorten upper arm. the thing is, you're changing the ratio and can gain pedal travel. first thing is to adjust the rod out to maybe get release. last thing would be to change pivot. you don't have to cut the arm, just drill a hole and put the pivot in new hole I found a used z bar and redone it. yes, this is from mopar race manual. I have seen some z bars where the bottom pivot is not down to the end of arm. my 273 dart was this way. all I did was drill a hole and moved pivot to it. didn't need to add to arm length.