TTI tailpipes with factory tips

Mattax said

I test fit a pair of TTI tailpipes on my '67.
The answer is 'it depends'.
it depends on the how the mufflers and forward are located and hung, and the year.
for '67 with stock located muffler and fuel tank, there will be issues.

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I bet so for the 67's. They didn't have duals did they? I know the HP 273 was still single, the 318 and 340 wasn't available until 68. I guess my point is there were no provisions for right side pipes in 67. Modify the trans crossmember and attach some hanger brackets to the floor pan.