The Jets are very similar but have several distinct differences when it comes to rebuild in terms of unique 3/4 or 7/8 width wear ring design and "odd" wear ring OD (very early to mid ) , most parts will swap , the early bowls are different as well. Very early have water lubed tail shaft bushings and different exit vanes real late have 'greasables" (zerk at back of bowl ) The nozzle adaptor size for the early Dom is a smidge different than Berk and later Dom , very early Place diverters were made differently for this reason lots of minor pit falls , mostly for the rebuilder. Outstanding quality for both pieces. The price (if in good shape) is good and fair IMO I'd be on it like a Fat kid on cake ..Tom
PS they all bolt directly to a berk suction
PSS if you decide you dont want it please let us know