heater delete general questions

Here is a few pics....one from a 1997 magazine article on a export heater delete Demon, the others are from my car and putting a left side fresh air box on the right.

I bought some 1/4"-20 rivet studs.... marked out the 3 holes..... drilled them.... added a little silicone(just in case) to the rivet head just before installing them, I'm very happy with them I highly doubt any water could leak through them from the cowl

Link for blind threaded rivets...
http://www.ebay.com/itm/x4pcs-1-4-2...tud-Captive-/200669921427?hash=item2eb8dc0093

Install was simple....

Add a star washer then a oversize nut(so it will spin freely) then a 1/4" nut, put a wrench on the over-sized nut and a socket on the 1/4" nut shove in hole and ratchet away while pressing into the hole you will feel the tension when the rivet is finished compressing

Detroit Muscle Technologies sells a left fresh air box gasket separately for $4.00
http://www.detroitmuscletechnologies.com/