Headers for 67 barracuda 318 with no modifications

mvh said
Be aware that running a second tailpipe over the axle in a 67 is difficult because of how the fuel tank strap is secured on the right side. It can be done, but it will be tight, and you can't run a big pipe. 2-inch or less is recommended.

I've got 2.5 inch tailpipes on my 67. Reproduction 67 tank with original tank strap. No clearance problem. 360, TTI headers and TTI 2.5 inch X-pipe exhaust.