72 duster resto

these are simple to use and cheap. piston at bdc, work as much cotton rope in through the spark plug hole as you can and turn towards tdc til the rope jams. go ahead and r&r the springs and repeat for each cylinder. many suggest compressed air in the cylinder through the spark plug hole but if you don't have a compressor or need to leave the job halfway through it becomes a pain. the rope won't go anywhere if left til you return, lol.
neil.
https://www.ebay.com/itm/275523420663