Carb Flooding

[Elvis]

Last week one morning when I started my '67 (it has a 302 with an Edelbrock 4 barrel carb) it ran fine for about 8 seconds, then began to run rough and finally stalled. I tried it a couple of times and noticed that fuel would start coming out of the top of the carb after a few seconds. A mechanic friend was supposed to come over yesterday to help me but, of course, a crisis came up and he can't make it. He told me to just take the cover off and clean it up - it is probably just some dirt in the system. I also have a rebuild kit. He said there is a seal that may need replacement. I used to rebuild the old 2 barrel I had on it but this is a new deal for me. My question is, am I biting off more than I can chew by opening the thing up. Please advise. E.