I upgraded my fuel system a couple weeks ago. I left the 950 carb on it and went to T&T week before last. It ran well,I drove it to track and back home. I made 4 passes it did not hook on the firs 2 at all. They finally sprayed the track and the next 2 passes it dead hooked and ran 2 6.30's, so the fuel system seems okay. I put my 1050 dom. on it Thurs. and it will not run unless you constantly pump the gas. I took the front metering block and bowl off and blowed with compressed air through all the holes in the block.I did not find any trash in it nowhere.I put it back together and it still will not run. The fuel is at the bottom of the sight plug. Can anybody tell me what I can do next? Thanks for any help.