Quote Originally Posted by xboxrox View Post
Hello Merg

Sounds like what my truck was doing even after installing a new non jet valve cylinder head ~ my truck has (had) two catalytic converters now the plugged one is gone ~ truck runs better although sometimes it still acts odd when accelerating in 2nd gear from a low RPM (surges like it needs fuel?)

MAYBE CHECK:

Catalytic Converters & exhaust system for plugging
O2 sensor / sensors
Air Inlet Temperature sensor
Air & Fuel filters (like new is best)
Vacuum leaks
Fuel Injectors test
Intake & Exhaust manifolds (check fasteners missing & tightness)
EGR system check operation
PCV check
Computer ECM PCM whatever it's called (try test driving with a replacement ECM PCM)
Wiring Harness Connectors (clean & remove any silicone)

I would not recommend a carburetor swap ~ I bet eventually you will accomplish the FIX
Best of Luck

why would you not recommend a carb swap? I am an outboard technician and am very familiar with carburetors.