I'm thinking way back they offered a 650 standard flange VS but don't think they make them anymore, they do make them in Spreadbore.
T67, if you shop around you can find a decent used 600-650dp for a good price, i really like the 650dp, its very versatile, especially on a mild SB. Annualar boosters are nice, but they tend to go "fat" in the upper RPMs & can be a bit tricky for the novice to tune in, you here it alot.