How do I remove the safety slide on a "pre 85,000" 1899 action?
There are some Savage 1899 Disassembly videos on youtube that are helpful.
Otherwise you'll need a quality set of screwdrivers and brass punch.
Summary:
remove butt plate screws/plate
remove stock bolt w/long screwdriver
pull/remove butt stock
I don't have a rifle in front of me and been a while since I've done one, but if I recall correctly...
remove the trigger screw/bushing
punch out the trigger pin
remove trigger and lever
I think you can see what you are dealing with at this point.
Hope this helps.