This worked for me: 1981 Formula Firebird (Bandit Tribute) Purchased a constant pressure stage 2 TH700R4 rebuilt $1899 Purchased aluminum drive shaft https://www.summitracing.com/parts/fms-m-4602-j Purchased 2 https://www.summitracing.com/parts/sdh-5-212x u-joints Reused yoke and crossmember Had to drill new holes in subframe for crossmember. Yes, that's a ford drive shaft. The length is perfect 45.5 inches. Weight 18lbs. The new u-joints fit the ends of the drive shaft, the other fit the yoke and rear end.