Hammer time! not that hard, but make sure you have plenty of clearance. When I did my speed daddys, I left what I thought was 1/4" clearance. Not enough apparently when I put the front mounts back in place.
Now I have a false knockin' machine! Gotta get back under there with a ball peen and take my frustrations out on that firewall. Good thing it's not my DD
One thing I did for the O2 extention was wrap it in that metal duct tape you normally use for dryer vents.
By the way, leave the O2 for the end so you know exactly where you need to hammer.
