Open or with holes?

I've got a 66 Barracuda with a 360. Mild Comp cam, .040 over, stock pistons and heads. EDY preformer and 1405 600 CFM. I want to try a carb spacer. Should I get the open center or the 4 hole style? Car will be weekend fun driver.

Thanks,
Mike


You might feel old when your wife who needs a knee replacement can walk faster than you can.