I ran the 8012 Stealth on my Tahiti, and liked it. I may pick up a little putting one on this motor, but my goal is to change to D0VE heads. Not for the breathing, but to pick up a point in compression. With the heads and intake, I would probably hit the wall with the logs, so going any further would be a waste. I just have to keep telling myself it's just an old open bow with an E pump......
I went from the weiand single tunnel ram to the stealth and there was quite a difference between the the two with the TR I could never get the plugs to color correctly. with the stealth I picked up a whole bunch of bottom/midrange but didn't notice any top end change. If you go to the single plane you will have to cut the impeller for sure. If your interested I have the motorsport single plane for sale. Check Real Jet boats.com under jetters parts for the listing.
Hope this helps BK