Quote Originally Posted by Mikej View Post
Do one adjustment at a time. As suggested it could be the float level. Under hard acceleration, the fuel could move to the back of the bowl and cause the bog. I little more fuel in the bowl could fix it. If you do more than one adjustment at time you run the risk of not knowing what the problem was.
Not too sure it is a fuel issue, my problem happens when standing still and flooring the pedal, the truck just bogs and will stall if you stay on it. Anything you ask it to do over 1500 RPM happens without hesitation.

The really vexing part of this is 1 out of 20 times the truck WILL launch, I just haven't figured out what is different between when she does and when she doesn't - which is why I am looking at the carb first - of course 4.11 gears couldn't hurt but let's not go there

How much part could operating temperature play? My cooling system is apparently SUPER efficient with an electric fan and aluminum radiator, engine runs around 160 all the time unless I turn the fan off...

Thanks Mikej!
BTW that is a sweet ride you've got there