Guts mod

To install just drag the files inside the zip archive to your game's directory

It will replaces what i said but if you want, you can change the number id of the file and it will replace another weapon, hair or armor, (if you replace a helmet that retains the head model of the character with the mods that have guts model or the berserk armor it will look weird) the hitbox of the swords will be the same no matter what weapon you replaces (example: WP_A_0221.partsbnd.dcx replaces black knight greatsword,  rename it to WP_A_0208.partsbnd.dcx and it will replace zweihander) if you do this with the armors, note that A_ before the id means it is for both male and female, F_ is the armor model for females, M_ is for males and _M after the id means the armor model is for when you are hollow, some armors use A and some use F and M, but all of them uses two versions, _M for hollow and without it for the human form. All the armors leggings uses F_ and M_ (AM_ is the gauntlets BD_ is the chestplate HD_ is the helmet LG_ is the leggings)

items id: https://gist.github.com/Meowmaritus/50311377844f79fb00aab9a8d9bf0d37

make sure to make a backup of the files you will replace, or you will have to reinstall the game if you want remove the mod