Reply to "1972 European GTS - Chassis 2609- Gr4 conversion project"

72GT, what you have is a front-engine intake manifold on the engine as shown. Front engine cars have their engines mounted on a slant for various reasons. Pantera engines are mounted horizontal and use an intake cast that way. You can run a tilted intake in your street Pantera, but you will have to carefully adjust the front & rear carb floats for proper mixture. If you have the carb pad milled flat, float adjustment is simpler but you will also have to redrill the 4 mounting screws to the new carb angle or they may loosen, bend, or break over time.

A cheaper alternative is an angled spacer rather than milling, but the redrilling still needs to be done relative to the new angle of the carb on top. And it increases the height of the carb by the spacer thickness, which will interrupt rearward vision a bit more, which some find objectionable. Finally, on an open plenum intake as shown, the engine may actually run a little stronger with such a spacer.... or not. It depends on your cam and a host of other things. Spacers are cheap and they need not be metal- try one and see how the engine acts. A spacer can also be run on a flat intake. Good luck.