I want to put a Harwood 4" cowl on my stock hood.What do I need to do to make the cowl adhere properly and what steps do I take to blend it perfectly for primer and paint . I am sick of running home all the time when there is a rain cloud overhead with my K-N popping through the hood.Thanks

Roll the lip of the hood opening so that you can pop rivit the cowl on from underneath and then blend the hood to cowl gap with a good bondo.