Help Identify Transmission

IIRC; Mopar put the T-10 into First Gen Barracudas with the 383. I think it was a one-year only deal, maybe 1968? Those have wussy gears in them, but should be good for lo-torque engines, with performance rear gears, and street tires.IIRC, they had a slightly lower first gear in them, and slightly wider splits; but I might have that backwards...... cuz the last one I built was in the late 70s, probably 40 years ago. The BH was dual-drilled.
The gears are narrow, and light weight, with generous synchronizers, and I'm sure a hi-reving SBM would love it......
if you could figure out a way to install it, cuz obviously, neither end is native Mopar.