Thank you all for your input. I really appreciate having access to all of your knowledge. I finally resolved this issue and I thought you might be interested in the cure. It turns out that this 3310-1 has a power valve in the secondaries (kind of superfluous). I removed and plugged using a Mr. Gasket plug, and the carb now functions properly revving nicely (even under a load) to 5500 RPM. In as much as the power valve accounts for 8 jet sizes, it was "washing out the plugs" above 4400 RPM or so (too rich). I couldn't imagine that this carb was jetted too rich with the factory jets for a 375 Horse 396 which is where the 3310 originated, but it was the power valve's contribution. Any way, thanks a lot for all of your ideas. I'm greatful to you all for your ideas.
[ March 21, 2002: Message edited by: sacrod ]</p>
[ March 21, 2002: Message edited by: sacrod ]</p>