RUN FAST! Course splined birfs and drum brakes. It will cost you big in the long run to upgrade them with brakes that actually stop and birfields that will hold up. My buddy has broken several course splined birfs running 33's and an ARB and yes the course splined pinions will haunt you!!
If this is for a cruiser look for later model, '75 and up I think, have disc fronts and better stock birfs and pinions.
