Pontiac Repair: inquiring about hot air choke riser tubing, pontiac dealer, pontiac trans am

Question
Have a 1978 Pontiac Trans Am 403ci  , carburetor type rochester r-4-m4mc , need the aluminum tubing from the intake, one tube runs to the choke and the other tube runs to the top back of carburetor as a blow by. can u help me with the terminology of this part or direct me to where i might locate it?

Answer
Not sure other than a junk yard on something that old. Usually if I have something in the shop like that ,I just make a new one out of bulk steel tubing or maybe brake line.
You could try to check at a local Pontiac dealer but I'm sure the heat riser tubes were discontinued a long time ago.