good reference for edelbrock performers (ignore the volvos
http://www.telusplanet.net/public/gilesij/Volvord/edelbrock_1.htm
http://www.telusplanet.net/public/gilesij/Volvord/edelbrock_1.htm
Didn't need one on my 67 440
Sounds to me like either you have a nick at the needle/seat or a pin hole on the float. Those are just guesses and require another disassembly... also get rid of whatever fuel you can and find fresh ethanol free stuff. That seems like a lot of corrosion for a year old carb. If it comes apart again, sounds like it will, shake the float to see if you think there is any liquid inside... heavy float/flooding would result. If the corrosion inside was that bad, you may need more cleaning or you may wind up all the way at just replacing it. Some fuel filters clog or start to come apart from the ethanol fuels which are corrosive in the first place... even fresh.
If you have doubts as to the condition of the carb, post detailed pics here and maybe someone will spot something.
good reference for edelbrock performers (ignore the volvos
http://www.telusplanet.net/public/gilesij/Volvord/edelbrock_1.htm