My old GMC doesn't want to run. It's an all stock '51 228 that ran fine last year. I'm getting decent spark and it will run briefly, better/longer if I put my hand over the carb but then it sputters out. I don't know what to check on next. Any ideas for me as to how to proceed?
Thanks

1951 GMC 250 Open Express
1968 C10 Suburban
1971 C20 Pickup

My Dad told me "Son, never hit a man in anger- unless you're certain you can get away with it"