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OK then - I know zip about Holleys so that may explain things

I've emailed HVH so hopefully they'll clear it up.

Worlds of differences in between the 4150, Carter,and Eddy square bore carbs compared to the Holley 4500 carbs Major differences, look at the spacer pictures of the two different types, 4500 on the left and 4150 on the right

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Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)