Yup, after looking at your photo I had that wrong... Your hoses are hooked up right but apparently you are getting manifold vacuum at the ported vacuum port... It may be that the throttle plates are open to far.... If you were closer I'd be wanting to have a look but that ain't happening..
Got it running, sounds good, idles good.....then when I take it for a drive and start accelerating quickly it want to spatter and pop before taking off. Let it idle then and when I put it back in gear it tries to stall. Any ideas??