Can I use electronic regulator

Thanks for the info 67dart273. Had done some reading and a lot of looking at wiring diagrams and had about decided that I could hook up either type of alternator to the old school two post regulator (like the black one in your photo).
Had not read anything about the better charging at low rpm for the "squareback" alternator. Will go ahead and get one of those to use instead of the "roundback". Also have already wired for "dual field" style alternator.
Am I correct in saying that the post 70's alternator has two fields and the pre 69's only have only one field is incorrect? They both have two fields, it is just a matter of how they are grounded? Pre 69 grounded to case, post 70 grounded through the regulator?