Originally Posted by Rustydawg
That was a Performer RPM Q-jet in the list of goodies, I have one waiting for tranplant myself. It has the full divider in place, no cutout like the squarebore job.
I don't know why they're not more popular - they'll accept square or spreadbore. I guess they don't grace the pages of PHR or Chevy Hi Perf all that often...
Spreadbores are more or less....obsolete.
The spreadbore manifold also flows differently in the plenum area which can affect booster signal.
AND putting a square bore carb on a spread bore intake causes all kinds of turbulence under the carb that can only slightly be healed by contoured spacers.
Weiand has a balanced plenum volume that Edel does not, which might or might not affect wet flow delivery, atomization and vaporization on a particular application.
All this turns into a "try them all back to back on a dyno" to see what is best,
just give it your best guess as to which looks the prettiest.