(Today Auto PSRU) Manufacturer of gears, reducers, gearboxes and all kinds of special gear trains. It makes conversion kits for aviation adapting GM and Subaru engines mainly.

"Chevrolet big-block engine, LS1"

-A Mustang P-51 plane with a Geared-Drives kit Chevrolet and LS1.

"Chevrolet big-block, LS1 engine”

"Rear part of the same engine, for accessories"