Thread: Questions on Butler performance BPI 315 cfm heads
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Old 01-13-2014, 07:43 PM
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David Holmberg David Holmberg is offline
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I had the Butler 315's on my 474 with a small roller (very streetable with power brakes) a 4150 Holley and went 10.90's @ 126 with 3.42 gears and a 3500 converter in a 77 TA 3650lbs.

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