DaveR,
I forgot you.
I have a Vic Jr. intake, and although it does not like to be in gear under 1500 rpms steady, I have had no problems. I think the big differance is you would normally run more rev's with the single plane instead of a dual plane.
The intakes are a jump ball. There are lots of engine builders that will tell you to use a dual plane for the street. Same guys will tell you to use a vacuum secondary. I currently use a Race Demon 750 with mech secondary.
I have had both set ups on a cobra. I prefer the set up I have now. The vacuum secondaries might keep you out of trouble more than mechanical. But if you are talking about a 500+ hp motor, I would go for the single plane and mechanical secondary.
Eric
