hey guys, So i got my 1980-85 crate 350 completely factory with an edelbrock carb. I got it in my 84 jeep CJ7 and have been driving it for the past couple of months, I only put about 600 miles on it so far and drove it to work last week. It drove fine all the way there, well that after noon, it wouldnt idle at all, and wouldnt run under 1000 RPM, now it surges, spudders, and runs very rough under 1500 RPM. and even if its runnin horrible and barely idleing, if you mash the gas its VERY responsive and runs GREAT over 1500. So i changed the fuel filter, and still nothing. I rebuilt and cleaned the carb about 300 miles back, so i dont think its that. but could my timing have changed some how or somethin?? please help, this is getting very aggrivating and completely PISSING ME OFF !!! lol THanks.