The Stovebolt Site Forums The Shop Area Engine Shop Engine won't idle

First thing that comes to mind is a vacuum leak, how about the choke and fast idle/hand throttle-did you make any changes to them? If the engine is still warming up and you have some choke assist, the heat riser should still be closed to some degree. As a comparison, my '57 283 V8 2 bbl. in the 2 ton truck did not have a heat riser out of the factory, choke and hand throttle needed until it's warmed up enough to idle and drive.