Originally posted by JohnE
Injectors will make a difference.
Maybe the previous owner had the stock plate reground, too.
Was the tamper screw in place when you removed the AFC housing?
Where does your rpm max out?
Originally posted by JohnE
Well sounds as if a governor spring kit (GSK) is in your near future. A GSK install will really make the truck drive better.
Does it look if they slid the plate forward?
Was the AFc hosuing slid forward?
How about a boost elbow?