I am gonna start off by saying I am a carburetor newb. I have a 84 k10 with a 305 with a Holley carb. The choke sticks closed and I can manually open it with my fingers but as soon as I step on the throttle it will close again so when it is revving down it won't go back to idle just high idle... Any help will be appreciated. I am about to buy a new carb with manual choke, however if I can salvage the 300 and use it somewhere else on the truck I would love it... Thanks