I have a 75 w100 318. I am having issues with it stealing once it is under load. Will idle all day but can give it gas or cuts out or stalls. It wasn't an issue before. Then it broke accelerator pump on two different carbs. Afb wouldn't pump after replacing pump. And the bbd is the one currently stalling out since I replaced pump. And it was running great before this. Fuel pump s new filter is new. Fuel line I changed incase it was clogged hard line. I have months and couple thousand in this truck and haven't even been able to use it. And really need it asap. Need help thanks

 

Stock carbs or aftermarket? Afb bbd ???

What's it stealing?

 

My guess would be: Forward progress.

 

And its bbd that is currently on it and stalling under load

 

Explanation of abbreviations would be helpful! bbd ??? Or pics!