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I Have... 521.. P-51, New TFS Street Mafia Intake, 13.6CR, 272/284 780 Lift.
In a... 66 Fairlane..

What carb spacer do you think i need? Base plate of manifold with out carb on is one inch below the bottom of hood... I planned on a Prosystems carb..

I know i should strap it to a dyno and find out, but no one has one within 200 miles of me..

Thanks..
 

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Trial and error if you're going to figure it out using a dyno too! :) Spacers are something you just have to try to see if they help, hurt or make no change. Most of the time I test an engine without a spacer, then go to a 4 hole, an open and a merge. Keep in mind too that the most expensive spacer is often not the most effective on the engine.
 
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