Can I use NFS mount as /tmp/export directory on satellite 6.2 for import purpose?

I am ready to run hammer import on Satellite 6.2 after I finished running export from satellite 5. However instead of keeping spacewalk_export.tar.gz on /tmp on satellite 6 as suggested by RedHat, I have created a NFS mount as /mnt/Sat_export/ under which I have spacewalk_export.tar.gz. My question is can I use this NFS mount as equivalent to /tmp after changing apache permission? If so, what need to be done on SELinux side?
Also, can I use /var directory instead of /tmp for the import on satellite 6? Thanks.