An SDS system will work with siamesed ports.
As Tlowe found out his Holley EFI is not optimal for siamesed ports either.
They are batch fire systems & work the same way, just the SDS you do not need a laptop to tune.
Tlowe installed port deviders which helped the idle, better economy, but it also severly makes the intake port window really small.
I had tested port deviders years ago on a flow bench & was so disappointed with the low flow I never installed them on a engine. I even widened the roof of the intake ports like I told Tlowe to do, they still did not flow well.
But, with a turbo or supercharger, even though the cyl head cannot flow good, the air/fuel mixture is being forced into the engine, so the results will not be as bad.
Running 3 side draft Webers or EFI T.B.'s are going to give you the best power over a single 4 bbl intake, Clifford or Offy, by a great margin.
I have run 2 bbls 4 barrels Offy's & Clifford intakes w/all different camshafts & compression ratios. It is the best set-up to make the most power period.
http://www.sissellautomotive.com/MBHD
