Forge unique items with lower items

I’m at level 135. What will happen if I forge an unique item with a level 120 golden titan item? I know the unique item will have 2 additional attitudes. Will the attitudes be as much as ones I  will receive if I forge the unique item with a level 135 item?

The attributes are set on the unique, exactly in the same way as the perk and main perk (like health or physical on shield). Meaning depending on your level and “power” of the item, you will get a set value of perks, regardless if you dismantle a very old and very bad stats perk.

It’s actually a good way to use old silver/gold items and not to worry about the process… if the perks are good enough for you.