1986 dodge ram d250
 

So i just bought this dodge ram 250 318 motor in it. It ran fine just needed a carb rebuild and radiator. However, i cleaned the carb and rebuilt it. And put it back on today and it wont go over 3500 rpm and when it gets to 3500 rpm is wants to bog down. Any ideas of what this could be? Maybe i need to adjust the carb some more? Thinking its more than that.