I think the Edelbrock LD4B and the Weiand Stealth are the same thing...

I had a LD4B and a Wieand Action+ I was able to compare on the bench. Obviously, the biggest difference was the spreadbore vs. squarebore carb mounting pad. In my case, I noted that the LD4B had larger ports than the Wieand by about a .100", but this comparison was done a bit over a year ago. The ports on the LD4B also looked like a bit of straighter shot to the ports compared to the Wieand as well, but this purely a subjective comparison. As was noted above, the Wieand also had the carb pad raised just a bit over the Eddy.

They are most certainly very close in design, but IMHO, I think the eddy was designed for a bit higher rpm then the Wieand. Just my 2 cents. I wish I would've taken pics at the time and posted measurements.