As long as you don't try to run a stripe set (mechanical or SSD), then you'd be fine. If you do go this route however, you'd need to get a card to run the Windows disk, as it would no longer work on the SATA controller built into the chipset (ports on the logic board).
I don't pay as much attention to OCZ's details, so if it has 8GB of non-user accessible capacity, that's a good thing (Intel does the same, and they set it to 10%). Assuming it is 28GB for a 100GB disk, then the OCZ would have sufficient reserve built-in (28%).
The general rule is 20%, as not all makes have anything set aside, and not all that do, have 20%. Even Intel doesn't do 20%. That's something that has to be kept in mind with whatever drive is chosen. Then use it accordingly.
As per wear leveling, it's just the practice of keeping unused cells available to replace those that have died (or result in corrupt writes if they can't be replaced with a "healthy" cell). But if there's an insufficient amount for the intended lifespan of the drive (typically 3yrs), you'll end up with corrupt data.
