Excise for trading firm (re-packer)

mention the ITC / HScode of the item or specify the item, before mputting such question 

yes , you are coming in the category of excise because packing is also a manufacturing according to the excise act.

Yes its deemed manufacturing defined in 2 (f) (ii) / 2 (f) (iii)

unless HS code or ITC is not provided, its complex to reply, say you purchaseda  truck and sold after re leveling, but as the duty of truck is already paid by manufacturer, you are not liable to pay, so important factor is the comodity and the distribution system process.