Larry, it's no problem if you decide to make upper lumps.
Like I told you in a email,the aluminum lumps I installed were not like the shapes I made out of modeling clay while bench flow testing.
They are a truely easy bolt in lump, just need to remove the intake boss to install.
I hope they do work out for you, and for the inliner community!
We got to beat those v-thingys somehow!!
Let us know your findings when you get a chance.
Goodluck!!
