A833 18 spline 4 speed crash box.
Just a couple of reminders for you....if you are planning on racing your car faster than 11.8 I think, be aware that you will need to ship your McLeod soft locker assembly with flywheel to them every 2 years for recertification. Im in Massachusetts and it costs me 300 bucks freight round trip to south Cali. And when they get it they will probably recommend a rebuild. This usually costs about 700. My Browell bell is now a 5 year recertification but again shipping that heavy piece is about 200 round trip to Lafayette Indiana plus the recertification fee ,I think 125 for 5 years. If I weren't committed to the soft locker I'd have gone with a Ram because they are on the east coast and freight would be less. Just something to consider when picking a set up.