[garry viohl]

The engines struggles and almost dies when braking hard in neutral for the last 10 to 20 feet of stopping. Here is what I have and done so far.

428 fe
Edelbrock rpm heads cam and manifold
Holley 800 double pumper
15 degress timing at idle
7 to 8 inches of vacuum at idle

I have tried adjusting floats
jet extensions on front bowl
vent whistles on front and back bowls
increase idle
dash pot
loop vent tubes on top of carb together
installed vacuum canister and tried them on carb pcv port and manifold port
called holley tech dept

Nothing has worked

Any ideas? Thanks.