Installed Fenton headers on my 1950 Chevy Fleetline 216cu in 3 spd. With 2" dual exhaust & glasspacks out the rear.Put water heat plate under stock intake. It has no vacum leaks or exhaust leaks. Problem is I have to run with choke 1/2 the way out all the time. Installed new Fuel pump & Carb no help.No problem till installed Fentons. But Love that Fenton sound! Don't know what to do next.Have any ideas that might help me out. Thanks Mike