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intake differences-venturi size

Old Mar 14, 2007 | 10:41 AM
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Green Streak
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From: Wallaceburg On.
intake differences-venturi size

I am building a 460 for my 78 f240 4x4. I have accumulated parts over the last couple of years and have noticed that the two intakes, one off of a 72 429 and a 76 have different size venturis. On the '72 all 4 are about the same size but the 76 has rear venturis much larger than the front. The block I will be using is a 76 Truck block. I am building the motor for longevity and drivability. Which of these two intakes would be preferable? Also, I have a good 4350 motorcraft carb, would it work better on either of the two intakes?
Thanks in advance
Greg C
 
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Old Mar 14, 2007 | 07:02 PM
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LxMan1
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From: Louisville,Ky.
If you have a good 4350 carb, it will give better throttle response and mileage running off of the small primaries and have good power with the large secondaries. If you needed a carb, I would use the square bore intake (all 4 the same size) and an Edelbrock 600 cfm carb.
 
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