Datsun 720 5-Speed Swap

Transmission and Rear End Gear Ratios

So this shows that there are three different 5-Speeds from the 1979 to 1985 Datsun 720 pickup. Says that it bolts up to the L6 motors too.

What I like is that one of the transmissions has the same gearing as the two-piece 4-Speed, but with a 5th gear.

Any data on this transmission? What year and models it came on? Is it the same length of the two-piece 4-Speed? Build with it done?

I want to keep an eye out for this transmission.