I run my 1.60 on a slimline pitts muffler and the perry VP-30. This is the one that runs off of crankcase pressure, not the oscillating version you have. I have to say it runs great. No deadsticks and consistent fuel delivery regardless of position of the tank or aircraft attitude. I generally agree with the KISS principal but in this case I could not get a consistent needle setting without the pump and I didn't want to crimp/plug my exhaust stacks. Also, in the future I plan to move the tank over the C.G..

There is always more than one way to skin a cat, pick the one that works for you and the folks at your field...
scott.