More than likely even if mixed up it will be alright just as long as all lifters are in good shape.

I guess a couple new one's would be less risky? But I'm not so sure on that?

I use some 4X4" blocks of wood to keep lifters in.

Push rods for a BAE hemi.

Then I have some custom made. Sometimes I have had more than one motor apart at a time, got to be organized. These are too small for BAE hemi parts.