Shift Points B2000

I need to the know the shift points for a B2000 with a 5 speed. As in what RPM/MPH per gear. I converted a 1984 B2000 to an electric motor and need to know the RPM vs MPH in what gear so I don't over rev the motor.
If anyone could take a test drive and note this, it would be great!
Thanks

in my 83 it runs about 50mph in 4th gear @ 2000 rpms and 55mph in 5th gear @ 2000 rpms. I don't know the rest off the top of my head.

Thanks, really need the 2nd and 3rd gear rpm / speed. That's where the motor is mostly used.