B&J Reversor

I have an old (but in new condition) B&J direct drive reversor unit. Wondering if anyone has any experience using this type of reversor?
Wondering how much more power it can handle?
Its Blue anodized and bolts direct to the can with 4 studs that fit through the candlestick holes in can.
The input shaft has standard coarse clutch splines on the front and has Lenco 16 spline on the other end where it meshes inside the reversor planetary. The output shaft is also 16 spline lenco.

Any information on how strong this unit is would be appreciated.
I plan to use it behind a 417 Donovan fuel motor with 3 plate crowerglide.

Thanks
Dave
david@linkplasinternational.com