Salvage files from harddrive

[jeffry killen]

Hello;
I have a hard drive that contains the /var file system in a system that
will not boot.
In single user mode I can mount  /var.

I want to take this disk and put it in another FreeBSD system and
try to copy the files I need off of it to a safe place.

The system I will plug it into will also have a separate disk with
/var.

Is there going to be a conflict with the labels and how would I
best go about this?

system is FreeBSD v6.2

Thank you in advance for guidance, suggestions.
JK