hi everyone new here hope some one here can help me. ive got a stevens 334 in 243 cal i want to change the scope bases they say the savage 110 base will fit i don know if it has the 8-40 screws are the 6-48 and is the round reciver are flat. i dont know witch one i need .so i hope some one on here can help me i hope so cant find anything that says what i need ...