Golly Chitz! Thats outrageous. Better get a bigger gas tank too. Not nitpicking a great design but the only things I might bring up for discussion is the volume of the plenum. Mine started out at 2-1/2" deep and after some research it ended up at only 1".
I'm not sure what you gain with the short runner length between the carb and plenum. Thats a lot of machining and welding. Did you do that for linkage clearance between carb and plenum?
I was also told runner length needs to be as long as practical. In my case something over 12" but I ended up with 8" as thats the length I had to work with. The factory Hyper-Pak 4 bbl runner lengths are close to 18" for manimun velocity.
One thing I will do different on my next plenum intake is make the top plate removable.(screwed down). That way, if I decide to change carbs all I will need is a new top plate machined.
Whats that old saying, "Six in a row make it go"!
And don't forget to go back and "Cad in" some nitrous bungs on your runners....
