quadrajunk carb no start

[caa332]

I have a quadrajet on a stock 350 in my 69 blazer, i rebuilt it about a year ago, but since then it has sat and hasnt been driven more than twice a month, problem is in the morning after it has set overnight, the thing will not start.... fuel pump checks ok, but i have no gas in the carb whatsoever.. i have sealed over the pots on the bottom of the carb with epoxy, thinking that maybe they where the cause, but that got me nowhere. choke set and everything else is fine, once it gets fuel to the carb it runs fine all day long......... oh, tried it on my 69 gmc pickup and it did the same thing....can anyone throw an idea at me.....