71 Dodge Dart Swinger in England
First pic is a spreadbore intake, second pic is a square bore. If your intake is like first pic at carb mounting flange where its not a square hole, you need adaptor plate to mate your eddy carb which is a squarebore carb. If you have an intake with carb mounting flange like in second pic with a square hole, you dont need the adaptor plate, and just need a gasket between the carb and intake manifold. Spreadbore intakes are for guys that run some holley carbs or GM rochester carbs with large secondary venturies. To give em room, thats also why those intakes have a dual bolt pattern with 8 threaded holes. Line up the ones that work with your holley or GM carb, or use the flat plate, and put on a squarebore .The squarebore intake uses the Edelbrock, or Carter AFB or AVS squarebore carb. Only one bolt pattern needed.
If the manifold flange is a spreadbore flange and the carb is a squarebore carb , its an adaotor plate to mate a squarebore carb to a spreadbore intake.
First pic is a spreadbore intake, second pic is a square bore. If your intake is like first pic at carb mounting flange where its not a square hole, you need adaptor plate to mate your eddy carb which is a squarebore carb. If you have an intake with carb mounting flange like in second pic with a square hole, you dont need the adaptor plate, and just need a gasket between the carb and intake manifold. Spreadbore intakes are for guys that run some holley carbs or GM rochester carbs with large secondary venturies. To give em room, thats also why those intakes have a dual bolt pattern with 8 threaded holes. Line up the ones that work with your holley or GM carb, or use the flat plate, and put on a squarebore .The squarebore intake uses the Edelbrock, or Carter AFB or AVS squarebore carb. Only one bolt pattern needed.