Guy's,



I’m having some problems with a rough engine stumble when I initially depress the throttle. Consequently with the stumble I have a hard time pulling out without stalling unless i get the RPM's up.



The engine ran great prior to the installation of a Schneider 274F cam; specs are 274 duration with 230 at .050. 480 lift and 110 lobe separation. Power bands from 2500 to 6000 RPM, I realize this is a lot of cam for a basically stock 312, though it is hooked to a 4 speed with 3:89 gears.



Also the carb is a Holley 465 CFM 4 barrell. I have checked the accelerator pump adjustment and it is spot on. Timing is set at 16 degrees initial advance.



Any help at all would be appreciated.