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Re: carb spacing, that is why I chose the Blue Thunder manifold. If you use an Edelbrock or Offy 2x4 manifold you must use Carter or Edelbrock carbs and the spacing is very close, 6 1/2" center to center I believe. Manifolds by Blue Thunder and Holman Moody use standard 427 carb spacing so Holleys are the way to go and you can use the oval dual quad Cobra air cleaner if you want the setup to look like the Shelby Mustang. For the record, if you look closely at a 427 dual quad cobra you should note that the S/Cs used dual S&H air cleaners with the rear cleaner using a lower profile filter element than the front to achieve hood clearance.
I have seen the Price adapters on a 351W engine and if they are painted to match the block and heads you have to look closely to notice them. Plates are also available to adapt the 302 manifold to Cleveland heads. I do admit that the most desirable way would be to use a manifold made for the 351W. I have long wondered why no one makes a 2x4 manifold for the 351W when it seems that all other Ford engines have one available.
I was thinking about the chokeless mechanical secondary 450 cfm Holley from the cost standpoint. Anyone have any experience using them?
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