Here for auction is a set of BBC OEM square port 427 heads. They have been reworked with stainless valves and new Lunati springs, locks, and retainers. The springs are for a 722 lift solid roller cam and are new. The port casting has been cleaned up but no heavy porting has been done. The casting numbers are 3919840 and the date codes are E23-7 on both heads which translates to May 23, 1967. They are fresh and ready to bolt on if your going with a solid lift roller can. 

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