didnt we already go over this a month back.
there isnt enough meat to tap in the civic pans… safely.
I assume you need a 3/4 NPT thread of an oil return? If so I might have the correct size weld bung on my shelf, and can TIG it on the pan, just about anywhere you need it. PM me if you are interested.
OR, I have a bunch of 1/4" thick round punch slugs of aluminum I use to weld on catch cans and what not, so when you drill and tap, you have 1/4" + what ever thickness material you welded it to to get plenty of threads cut in to hold very well.
I also have the 3/4 NPT tap set, so what ever you decide to do, I can do it for ya. so PM me.
Both solutions are the best.