Ok, I've found the thread from Iron Indian that said to click the link for the how-to, but when I do it gives me an error. Maybe left over from the site upgrade, who knows. All I know is I need to know what modifications I need to make to allow the 1 3/8" rad from the 98 Monte to fit into my GP GT as my new(er) one decided to leak in 4 places on the core and is trash now. I figured it was a good time to upgrade but the link is bad. Anyone else have it?