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Author Topic:   493 cylinder heads
Donnie Ross
Dirt Maniac

Total posts: 109
posted December 25, 2001 06:26 AM
could these have the same ports as 492s with open chambers? I know they were used on 71,72 400,s

Dirt Freak

Total posts: 467
posted December 26, 2001 12:04 AM
I doubt if they do , you would probably have to flow one to find out how it compares . I can tell you that they crack like crazy though !! That's part of the reason 400's have such a bad reputation for overheating .

Hendren Racing Engines
Rutherfordton , NC

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