Not sure what the lightest carb is that would still have decent performance. Thermoquad maybe? QJet is probably fairly light. Maybe need to do a weight vs. power shootout to pick the best carb for you.

I agree. 5 pounds is extremely unlikely to be seen on a time slip, and unimportant on a street strip or bracket car in the whole scheme of things. And that's if there is even a 5 pound difference.

Thanks for the help I found a 850 xp on ebay and I am going to try it Thanks again Matt.

One thing I have read is how well the fuel is atomized for various intake temperatures is very important? An X plain intake without heat may want very good atomization, a heated dual plain might suffer from it. The same might apply for the same intake, heat versus no heat in the intake regardless of manifold.