[Tom Goldman]

Tubing thru the firewall tying the cage to the front frame is acceptable in Stock .
To make it effective , you need to install a roll cage , not a roll bar .
I try to pass thru the firewall as high as possible ,or practical .
Try to tie the upper inner fender to the bar before angling down to the frame .
Mopars and other unibody cars will need a reinforcement plate welded to the frame rail attachment point for strength .