Problem with my 360 with the 273 adj rockers

I'm using the 273 adjustable rockers on my built 360 with a solid comp cam and have the rockers adjusted pretty good but the lifters on the cast shaft have a little play and make noise when the car is on.... So it's looks like I may need some spacers but wat I did was tighten the lifters just a tad bit more so the lifters didn't move on the shaft side to side and was just wondering if that's safe or wat would u guys recommend??? Thanks for all the help