diag help ford 390

[Jeff]

freshly rebuilt ford fe390, edelbrock 390 street master intake, holley 600cfm vac secondary, hei ignition.
has slight hesitation on light acceleration, get further into the throttle cleans up and goes. installed at 25 squirter, installed a 35 squirter, no change. base timming is 12 degrees, with vaccumn advanced hooked up has 27 degrees off of manifold vaccumn, gap is .050, idles 13-15 inches of vaccumn, adjusted primary squirter, with air cleaner of, apply throttle, has a good shot of fuel
looking for ideas to resolve, becomming very frustrating on light acceleration
Thanks
Jeff

[unclelarry]

You might go to 38 or40 squirter, and double check the pump . Larry

[Jeff]

Thanks for reply Uncle Larry
I did install a 38, have not driven yet. when you refer to the pump, accelerator pump of fuel pump? with engine running removed sight plug and fuel is just under the opening
Thanks
Jeff