Tools of the trade. Here is the lineup of custom carbide burrs used to port cylinder heads. These tools have helped Jack carve out the ports of some serious cylinder heads on racecars around the country and even in Australia. Noted Mustang racers like Briante Racing, Jim Blair, Elias Delatorre, Mike Modeste, and Dwayne Gutridge have had their heads ported by Jack. They are the same basic tools that Jack has used for the past 28 years as a head porter.