where to drill a 2 inch hole in cowl

Someone on here asked this question a few months ago.
Here is what I did:

I hole sawed about 2" where the cowl plenum drain hole already was. I located the hole saw so that it's lower radius encompassed the existing cowl drain hole. I extracted the crap, sand blasted, blew out, soaked with pure alcohol and epoxy inside my cowl area. As you can see above the hood hinge pivot, I hole sawed out into the plenum and saturated Eastwood's inside frame coating in there, all over the friggin place, then shot a bunch of epoxy in there. It's locked in for the long haul.

Do it to it! Best to have all the garbage out of your cowl and air system. I recommend you pull your heater box and any thing else connected to your cowl (vent chambers) so you can clean them out too.

Oh yea, mines a 74 duster so, may be slightly different but the concept is probably very much the same.