This Product Fits The Following. 1967-1972 A-Body Cars (Dodge Demon Dodge Dart Plymouth Valiant Plymouth Scamp Plymouth Duster Plymouth Barracuda.) Note: Only fits cars using 73-76 Center link and spindles. May not clear some aftermarket headers except Schumacher Tri-Y and 440 (High Deck). 1973-1976 A-Body Cars (Dodge Dart Sport Dodge Dart Plymouth Valiant Plymouth Scamp Plymouth Duster)
So fits Schumacher Tri-Y with 440 (high deck). That’s it.
Everything else that is close takes fabrication on your own. HiPo manifold cars need custom made head-pipes and possibly milling exhaust at angle. Then custom headpipes needs sharp rearward turn. That was done 30 years ago by some brothers in BC 68 Barracuda. Results may very.