BioMax
+1y
The important thing about cab mounts is to build them so that, if the vehicle gets into an accident, they can't tear appart and allow the cab to leave the frame. Think about it like 4-link tabs, even if the eurethane was to completely wear away, the bars can't leave the tabs. A busing that is big enough to use on an upper arm is probably plenty for a cab mount. The downfall of the smaller bushings is less vibration absorbtion. You will feel more small vibrations from the motor and suspension.