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05-18-2024, 11:37 PM
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VIP Member
Join Date: Dec 2001
Location: phoenix
Posts: 1,486
Likes: 66
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Re: 335 HP 396 290 Head Casting Build & Dyno Test
I have had 3 sets of 290 heads on s/s. The best set had bottom of exhaust brazed in and made flat. The intake as high as it could before going thru roof. Kept spring rate 300 or better closed. Under 300 I would lose 1 or more MPH.
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