There are two excellent pdf's for this carb at summitracing.com.
With stock manifolds I expect this motor would be around 300HP.
600 cfm no 1406.
You will have to look on the carb and get the numbers on it and then go to the Edelbrock website.
Or from autozone you can buy a quadra-jet to standard adapter plate if you don't have that edelbrock or if you have a holleythe intake manifold is hopefully what youre talking about and the answer is noAnsweryes you can. if you have a stock intake manifold, which uses a quadrajet carb, you can use edelbrock part number #2696 which you can buy from summit racing (www.summitracing.com). it allows you to use an edelbrock performer square bore carb on the stock quadrajet manifold. for that motor i recommend the edelbrock #1406 which you can also get from summit.
It should be preset from the factory
Yes. Consult Edelbrock's website for specific details.
none, unless the old carb wasn't working properly.
yes
I've had good luck with the Edelbrock 1406 right out of the box.
With the edelbrock, use the vac line on the carb itself, It will be a small bore, 1/4 ( about ) vacuum line, and should be on the front of the carb.
Pretty sure you can mount any standard flange or spread-bore carb on an sp2p. The Edelbrock website is an excellent resource for answering those kinds of questions.