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1967 Mercury Comet Gt Head Casting

With their 2.02/1.55 valves, the Comet's 390 GT head castings (74cc chambers) share valve and port dimensions with early 427 high-performance heads. Sure, later 427 Medium- and High-Riser heads are better for all-out performance, but for our mild street/strip cruiser, these castings are just fine.
1967 Mercury Comet - '67 Comet Stock Replica Engine Rebuild

 With their 2.02/1.55 valves, the Comet's 390 GT head castings (74cc chambers) share valve and port dimensions with early 427 high-performance heads. Sure, later 427 Medium- and High-Riser heads are better for all-out performance, but for our mild street/strip cruiser, these castings are just fine.  View Related Article

 

 

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