quick fuel metering plate conversion kit... pics..

What is the cost verses the metering block conversion from Holley? The Holley is $40.00 without the float or the extentions, but you can get the flat type extentions from Mr Gasket for $10.00 and use the std float. Just courious to see which way is cheaper and achieve the same job. I know QF is prettier but you won't be able to see it while running. So looks are unimportant.