Meathead is usually a good source of information. I have used his recipes to take a brisket through the brine to corned beef and then pastrami from his website. The pastrami turned out great
His pastrami rub
After much research and trial and error, here's my approximation of Katz's pastrami rub recipe for a New York pastrami sandwich at home.
amazingribs.com
His pastrami recipe
If you've ever wondered how to make pastrami then we've got you covered. Moist, tender, and full of flavor, this is the ultimate homemade smoked pastrami recipe. So what is pastrami? Simply put, it's Jewish barbecue, i.e. corned beef that has been smoked. This is about as close to Katz's...
amazingribs.com
You already have one in a corned beef brine, so you shouldn't need that recipe
If nothing at all, it gives an idea of the process and some ingredients. Plenty of recipes out there, so no shortage of ingredient suggestions. I have made Meathead's Montreal Smoked Meat recipe as well, another good one to try