If you have the Daiwa Spinmatic Ultralight spinning rod rated 2 to 6lb, then you definitely should not put 8lb test line on your reel. Secondly, your Sahara 1000FE has very little capacity for 8lb test line. 6lb test might be ok for that reel, but its capacity is perfect for 4lb test.
Ultralight spinning rods are ok for pink salmon fishing, but you'll find bringing the fish in can take quite a bit longer than a medium/light rod. Daiwa Spinmatic has very little backbone, so it'd take even longer than a stiff ultralight spinning rod like a Shimano Clarus.
6lb test line is fine for landing pink salmon, but you will find that after fishing landing a few fish in the Tidal Fraser River for awhile, there will be damages to the line caused by silt and debris in the water. My recommendation is a slightly heavier rod and a slightly bigger reel like a Shimano 2500, so you can spool it with 8lb test. This setup can last you throughout the entire season without any issues.