I use impact gun too.
If your talking M clutch and undoing big nut that holds the conical springs against pressure plate, then get two pieces of decent steel. Join together one end with long bolt into swing arm pivot and at oposite ends bolt in each arm that lines up with the slots in the outer pressure plate.
Hope that makes sense, can take picture tomorrow night if you don't understand that ramble.
If you on about inner basket so clutch already out long bar attached to old clutch steels with spacers.