I run a steel front planetary(727).... just another piece I didn’t want to worry about. Few years ago member Jeepmon stripped his out at MaTS in the burnout box. He all but threw in the towel for the weekend, but the kids pulled the trans and we fixed it in Al’s trailer with a swap meet core. Had it ready to rock by 11pm and he ran quick 16 the next day. Iirc he was around 900hp... not sure why it still had an aluminum one in it.