75' Power Brake Upgrade Actuator Length

Search didn't answer my ??? I have a 75 CJ-5 with converted disks on the front, 11" stock drums in back. I have a YJ booster/mc assembly and proportioning valve to install. The actuator rod on the org. non-power MC is 3/4" shorter then the new YJ set-up. I have read where people complain of syptoms such as "spongy pedal" due to the actuator length of the YJ setup. Has anyone with an intermediate CJ done this upgrade and not have had to adjust the pushrod length? What was the final length if you did lengthen/shorten? I don't know if the intermediates have the same issues as the 76+ issues with this mod due to different brake pedal set-ups. Thanks