Terry Nuckels posted:Intermeccanicas with tube frames have more room in the rear because of the forward placement of the engine which allows wider rims/tires.
But they're a b!tch to install a Berg-5 in...
I know that Henry(IM) makes further adjustments to the frame on an IM6 which probably facilitates the 5 speed(915)/flat six engine install...whether that applies to a BERG5 is beyond my understanding but could be part of the explanation(?)