ploof-pack/faithless/assets/minecraft/models/item/handheld_sword.json

{
    "parent": "item/handheld_tools",
    "display": {
		"thirdperson_lefthand": {
			"rotation": [67.5, 90, 90],
			"translation": [-10.5, -6, 2.5],
			"scale": [0.85, 0.85, 0.85]
		}
    }
}