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Old 07-07-2016, 06:52 AM
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steve25 steve25 is offline
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How much HP are you looking to make first off?

Those heads will not work with a out of the box rpm manifold and a 750 Q jet Carb will be a restriction in and of itself on a 428 or larger motor above 5400 rpm with theses heads dependant on how it's Camed.



The flow level of the out of the box heads will overwhelm that rpm Intake manifold and even worse the limiting HP factor of that it will narrow up on the motors power band and make that band more peaky!
A Victor or similar Intake is the only way to go, and to use such the car needs the gearing for it, and once your into the Victor manifold your Q jet can not be used .

You did not post much info, but I think your looking to bolt on way too much head for the way your car is set up right now to make full use of it
Also if you have D port headers now your into a real good chunk of money stepping into the needed round ports!

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  #2  
Old 07-07-2016, 11:54 AM
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Skip Fix Skip Fix is offline
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A Victor or similar Intake is the only way to go, and to use such the car needs the gearing for it, and once your into the Victor manifold your Q jet can not be used .


Some of the SS racers still use a Qjet with a Victor. GTO Karl here used one on his street car and a Qjet had a nice adapter he made.

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1964 Impala SS 409/470ci 600 HP stroker project
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  #3  
Old 07-09-2016, 03:53 PM
AC445 AC445 is offline
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Hello all,I have a 4" stroke & 4.210 bore engine,do you think an original Nash intake will work ? Also what size valves would you order using a single pattern solid roller with 270 at .050 and .420 lobe lift. Thanks

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