I've been eyeballing hood vents for quite a while and was stoked when Trackspec released a set of vents specifically designed for the 67-69 Camaro cowl hood.
http://trackspe.nextmp.net/1st-gener...d-louvers.html
I just installed a set on my painted steel cowl hood and wanted to share the install. Detaolils beliw and a howto on my blog.
Trackspec Motorsports 1stgen Camaro hood vents.
Here is the hood off the car with the supplied templates taped down. The template is the same outer diameter as the vent and has "cut line" cutouts where you need to cut. Trackspec recommended using a grinder with a "thin cut" cutoff wheel.
I decided on hood vent placement based on three variables. 1) I wanted the vents placed inboard towards the center of the hood to avoid cutting the strength rib running down the sides of the hood.
See this pic for the rib:
2) Placing the vents closer to the front of the hood but behind the radiator fan shroud opening and 3) far enough foward so that the inside front rivet would not have to pass through the small bump in the below circled area and instead be flat.
The angle grinder worked well. The paint about 1/8" from the cut line was burned in spots but is easily covered by the hood vent. I did some basic edge prep and taped off the cut openings about 1/8" back on top and bottom and hit it with touch up spray paint to keep it from rusting. Also, because my hood understructure was body color this helped pain some of the now exposed understrcuture so it would be red when looking though the vent from the top of the hood.
Following the template means you have about at least 1/4" larger hole than the louver part of the vent. This gives you room to position just right. We then taped it down and proceeded to drill and rivet the louver. My louvers matched the slop of the hood perfectly side to side. However front to back the vent was slightly bowed more than my hood. Therefore, when drilling and riveting I started at one end and installed one at a time so that as the vent laid down and conformed to the hood I didn't have to worry about the last set of holes getting out of alignment which might have happened if you drilled all the holes and then installed the rivets. Drill slow and apply light pressure! Will help minimize any jagged metal on the hole exit.
Here are some pics of the finished product.