This 6bbl set up spun out 684hp on my 493" RB and fit under the factory Shaker. The build and dyno run are still on Hughes website. I'm switching over to the Wilson ported EFI intake on the left in the photo. My shaker hides it anyway. https://www.hughesengines.com/TechArticles/1dynotest684hp500cid6pack4bbljcross012007.php
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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