hey PhilM, i had the Vortech supercharger and their carb enclosure on my 355 sbc and hit 7k regularly with 10+ boost and had no problems falling flat... My carb was built "specifically for blow thru" set-ups. What they did to it, i have no idea. Sorry, wish I had more details on what was done to the carb.
I am now going with a bonnet style top hat due to hood clearance issues on my new 388 sbc and have it set up for 15+ psi...
I think I'd look in the direction of the carb!!
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70gotboost
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