Thread: Mismatched Heads on a 1972 YX engine
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Old 11-20-2025, 01:29 PM
78w72 78w72 is offline
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Originally Posted by 78w72 View Post
6x-4 heads on a 400 wwa 8.1:1 according to 78-79 W72 specs... 6x-8 was like 7.6.
That was supposed to say on a 400 "was"....

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