Great looking car. I am looking to replace Z28 hood with cowl. Is that a 3 inch or 4 inch cowl? Who manufactured it?

 

With which blower. I have a Weiand 142 inch mini blower /372 small block in my 1979 Z-28 .And I use a 6' Glastek cowl hood .With a bigger blower they wont fit under most hood scoops ,And then you have some sight restrictions depending on the state, Thats one reason I went with my set up.