Hello, i'm new,and i'm also a chevy truck inthusiest. I have a 75 chevy cheyanne,with a 350 engine. This truck has a brand new engine and body work. I've got a new eldabrock carb. to go on the engine but with out these parts the choke want work correctly. I'm looking for a heat riser vacum diaprahm,with the rod that operates the heat riser,this also helps the choke warm up on cold mornings I wish someone could help me please?