let me start by saying that i am much more familiar with efi, so this may be a very simple issue. i recently installed my 350 (80-85 in an 82). now that i have it all hooked up, i'm trying to start it, and it'll crank fine, but it's not getting fuel. i have a clear fuel filter before and one after then fuel pump, so i can see that there is fuel between the tank and pump, but not between the pump and carb. i tried disconnecting the line from the carb and dumping fuel into the line. it does not fill the filter and does not appear to be flowing into the other one, through the pump. my guess is that it is going back to the tank via the small return line on the pump. is this feasible? could i just block off that return line? is my pump dead? it worked fine on the old engine, but it's been sitting quite a while. any ideas?