With that intake you will lose a lot of low-end torque and you will also need to turn some high rpm's to take advantage of the added hp that you will probably not see.
I use to run a 650 dp Holley on my 302 but now have a 347 and run a 750.
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James Cox
nochevy@hotmail.com
1991 Mustang LX
12.565 @109.38mph 1.764 60ft