A 1990 110 F was a very good rifle. The long action and short 308 Win made it kind of a like the Savage answer to the M24.
As stated, the standard trigger and accutrigger are not interchangeable. That isn't to say you can't get a better trigger.
The standard trigger is adjusted with a flat spring, and is easy to adjust down to an unsafe level trying to get the trigger pull you want.
A Timney trigger that replaces the standard trigger will use a much more adjustable coil spring setup. I've replaced a number of Savage triggers with Timneys, and I've never regretted it. I have not use the Rifle Basix trigger, but I have heard no complaints about it either.
Jimro