Stumble off acceleration

[Bobcherry13]

I have a 69' GMC c-10 with a crate 350 (not sure on how exactly how crate it is, did not do any "engine" work to it as of yet do to just bought it), edelbrock performer manifold, holley 700 cfm double pumper (mechanical) with the choke pulled out, new Mallory ingnition, not sure of cam specs but is a mild cam. the carb has 31 and 28 sized accelerator pump discharge nozzles in it. stock fuel pump. slammed to the ground with 31" by 18.5" Hossier radials on the back. upon stomping on the gas the truck stumbles, then picks up and accelerates pretty good. everyone says that the 700 is too big of a carb but I am planning on putting new smaller cc heads on in the future. also, I would think the engine is getting too much gas but the tuning book says the accelerator pump discharge nozzles may be too small and not providing enough gas. another guy said it could be the power valves. I hate carb tuning. please give me suggestions, I was just going to buy two 35 nozzles and try that.