1966 Barracuda 273 build

Jim Lusk said

Assuming you have '66 heads, any 318LA intake will fit and match the ports. A small Edelbrock carb will work great.

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Jim yes I do have the original cast iron heads. What needs to be done to them in order to make the build work with the info I supplied in my initial statement? Or what heads can be used to as a replacement?