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Boss 302 Build Block

Boss 302 blocks have screw-in core plugs, also known as freeze plugs. According to Jim, never try to remove them. Screw-in plugs coupled with four-bolt main caps are what separate a Boss 302 block from other small-block Fords.
How To Build A Better Boss 302 Engine

 Boss 302 blocks have screw-in core plugs, also known as freeze plugs. According to Jim, never try to remove them. Screw-in plugs coupled with four-bolt main caps are what separate a Boss 302 block from other small-block Fords.  View Related Article

 

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