What are the major differences and what to look for between the HS and H50 series engines, Im looking for early ones (im thinking HS) for my Bonanzas I would like to stay correct for the era there are a few of those around in my parts and would like a little more info on the differences and whats correct for my 1400 and 1300 I did aquire a very clean looks to be sitting on a shelf for many years side exhaust 3.5 but would like a 5hp on both of these. Thanks in advance JC