[68pony]

I had the exact same problem, I had the Holley 950DP rebuilt , new needle and seat and floats, presto no more flooding. (427, small block) Starts instantly cold and hot now , mine would flood even after sitting for 40 minutes after turning off engine, if I stopped to buy fuel (5 minutes) would start no problem only if left sitting for a while, carby rebuilder said there was a lot of dirt in the bowls so I changed both my fuel filters at same time 1 between the tank and fuel pump and 1 just before carb , I would change your fuel filter aswell, hope this helps.