Valvetrain + eddy heads ?

So I just got the 340 dropped into the car last weekend and I'm running eddy 60179 heads on the stock valvetrain (rockers and rods ) but I'm beginning to believe that I need some different length pushrod? Car runs great but have a lil chatter in the rockers . Haven't torn it apart to verify but that what it sounds like .
Cam specs are Comp cam
Intake Duration at 050 inch Lift:240
Exhaust Duration at 050 inch Lift:246
Duration at 050 inch Lift:240 int./246 exh.
Advertised Intake Duration:284
Advertised Exhaust Duration:296
Advertised Duration:284 int./296 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.507 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.510 in.
Valve Lift with Factory Rocker Arm Ratio:0.507 int./0.510 exh.
Lobe Separation (degrees):110