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As we get deeper into the finish of our Mopar A-body Project Fighting Fish Barracuda, the roll cage was an important step before taking the bare body off of the rotisserie.
Since owner Zak Hawthorne wanted to build a multi-purpose racecar – one that can run on the street, the local dragstrip or road racing at a track like Southern California’s Buttonwillow or Willow Springs, it made sense to install a roll cage made from DOM mild steel tubing.
DOM mild steel tubing is a requirement of some road course sanctioning bodies and rather than retrofit the Cuda when Zak decided to go road racing, he opted to finish with a 10-point roll cage from S&W Racecars. He ordered the S&W 11-2530-DOM for the 1964–66 Plymouth Barracuda or Valiant with 1-3/4 x .120" wall DOM tubing.
The DOM designation is sometimes referred to as “seamless”, but the .120” wall thickness is stronger than conventional seemed mild steel tubing, with the seam hidden inside the tube itself. DOM stands for Drawn Over Mandrel and it is actually tubing that has gone through a second process that shapes and smoothes the tubing so that the walls are more uniform, not to be confused with chrome-moly tubing.