If you have the B-1 that would be fine but you will need an external gate to the hot pipe or an internal gate that is on the B series. The 60's seem to be fine but there light years behind in technology, it really all depends on how much money you want to spend. As and example anyone can build a set of Twins with stock turbo's but it won't work as well as modified ones will... ..... been saying that for 3 years now! I'm not on my 3rd configuration of Twins and about to go to the 4th but only minor changes.
Jim