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BlueOval Ralph · 06-18-2012, 01:54 PM

Just use a 3/8ths drill with the bowl up side down. Seems as I remember there was a difference between the 4150 & 4500 bowls. Are the ones you got drilled and tapped on both sides of the fuel inlets? If they are they are 4500 bowls.

06-18-2012, 01:54 PM	#2
BlueOval Ralph Banned Join Date: Feb 2008 Posts: 852 Likes: 0 Liked 0 Times in 0 Posts	Re: Holley float level sight plug holes Just use a 3/8ths drill with the bowl up side down. Seems as I remember there was a difference between the 4150 & 4500 bowls. Are the ones you got drilled and tapped on both sides of the fuel inlets? If they are they are 4500 bowls. Last edited by BlueOval Ralph; 06-18-2012 at 02:47 PM.