Frankie, thanks for your information 7 years ago, and your patience with all of us converting this Z24i or VG30i to a Weber 38-DGES.
I found that REDLINE makes this Weber conversion kit # K644-38.
It is a little different than what you have presented.
They use a "By-Pass" to the tank fuel pressure regulator that is alot easier on the original fuel pump at 22psi.
REDLINE also made a bolt-up adaptor plate that will eliminate the offset mis-drilling into the manifold.
Their real Weber 38-DGES also comes pre-jetted for the VG30i and/or Z24i engines.
Again, this is an awesome thread and saved my truck.
UPTILLNOW
or search E-bay for K644-38