TTI FOOTNOTE # 55
Z-Bars: "A"-body applications with Standard Transmission.
Small Block: A modified Z-bar may be required when running TTi Small Block Headers in an A-body with Standard Trans. No modification required to the ball stud bracket. TTi modified Z-bar part #ZB407
Big Block: A modified 383/440 Z-bar required when running TTI's 383-440 1-3/4" or 2" Headers in an A-body with Standard Trans. Your ball stud bracket may also require slight modification in order to clear the modified Z-bar. Check for proper operation prior to installing the headers. TTi modified Z-bar part #ZB307 / Illustration Sheet # 808ZB [.pdf]