don't worry about spending money on a dual snorkel set up. just get an open element and be done with it. you can fit a 14x3 flat base below the stock hood pretty easy with the stock intake.
for cam i would sugest taking a look at comp cams extreme enegy line. for a mild to moderate 305 an XE268 or maybe an XE274 if you want a bit more would work great.
carb and intake i would jsut suggest keeping it simple. something along the lines of a performer would be just fine. add a holley 650 or use the stock CCC with some tuning and you will be throwing down nice numbers emissions legal and extremely driveable.
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