That meltdown was after an idiot mechanic caught my van on fire using a torch.I found out a lot about insurance that day.

That little old ninja had awesome power! The 8.4's are going into an older Steamway 900 that has 3 two stage motors and a big ass cat pump. And you're absolutely right about the custom manifold. Thanks to Ron "Cleanworks" Marriot, I was shown the light on how much better the vacuum is with that and introduced to his mad scientist metal fabricator that built one for another machine I'm using now.With two 5.7's it sucks like mad so I can only imagine how much better it will be with the bigger vacs.
In the People's Republic of Canuckistan I have to special order the vacs in with a 6 week lead time from the supplier as they aren't really on the market here yet.