Thanks Mr Lang. I read an article last night saying what I need is the vacuum above the throttle plates. That would rule out the adapters bigbadswingdaddy. I did find them but the description just said they provided vacuum. It didn't say how that vacuum was to be used. I think I'll give the vendor a call Monday and see what they say.
I played with tuning them yesterday and got them to play better with each other but still have the front one pulling more air than the rear. They sure did wake up that engine.

40 Chevy 1/2 ton