Keep breaking 3rd gear

a few years ago, I had a friend ran a 18 spline mopar trans behind his 500 " mopar. he broke 3 rd gear a lot. he did his burnouts in 3 rd gear. also had bronze puck clutch disc and lots of pressure. mccandless told him he had wrong setup. way too much clutch, and doing burnouts in 3 rd gear was causing his breakage.