The Feuling pumps are very good and give significantly more volume. They have a tendency to quiet engines down some.
On the downside they have some tendency to sump, not sure I would use them in a TC softail, but on a Glide you should be OK if the bike is ridden all the time.
It depends how much work is being done to the engine, on a 116" I would say go for it, but on a 95" I would be somewhat reluctant to spend thqt much. I do understand that to some 500 bucks is nothing though.
H.