So I've been having what I'm fairly certain is some carburetor woes over the past few months and I was hoping you guys could shed a little light on the situation. It'll start up and idle just fine and even when I rev it up everything sounds fine but when I'm driving its very sluggish and starts popping and backfiring when it hits around 3000 rpm, sounding like It's starved of fuel, however after driving for maybe a half hour or so itll run fine until I stop and then Itll act up again. I took the carb off and installed a rebuild kit and removed a fair amount of silt from the bowl and when I took it for a test drive it ran better than it ever had for a little while but as soon as I stopped at a red light and took off again It was back to its old ways. I've been searching around the internet and havent really found much so any help would be appreciated. thanks.
Here's the truck as it sits today