7 1/4 to 8 1/4 swap

the reason I asked is it has about 1 1/2" play now and we are going to put some higher than stock springs in along with the rear swap which will increase the slip yoke play so I want to account for that when we take the measurements and I think 1 1/2" is the outside of acceptable range? am I correct in thinking 1" to 1 1/2" of free play?