Eddy head question

so I have a couple questions. when I was getting ready to take off my iron heads, before I removed the rockers i was wiggling the push rods to see how much play there was and all but a few were pretty loose, not real loose but I could for sure wiggle em and wiggle the rockers back and fourth on the rocker arm. (the rockers and rocker arms are new so I know they aren't worn).
Once I got my eddy heads on and torqued I installed the rockers and tried the same thing with the push rods and rockers and there was no wiggling in them at all. is this a good thing or bad thing? i would think a good thing cause before I would hear a slight rattle, and I would imagine that was what it was.
My second question is; I had to jimmy my motor out enough to work around my dougs headers in order to get my eddy's on and now it will be way to hard to get it back in without a puller, so I am going to get one to put the motor in, but i dont have the intake installed so i was curious if the threads on the heads are strong enough to use to bolt the chains to in order to hoist it back in?
Thanks -Kory