Is this normal?

you can get the choke spring assembly off rockauto. Its on closeout now, doesnt come with a gasket, at least mine didnt. The cup is a mopar part. somebody on here hooked me up with a gasket for my sons 318 2BBL intake. i think they said that gasket comes in the master engine rebuild kit. i know rock doesnt sell it seperate. another option would be to buy a sheet of the metal and asbestos perforated looking header collector gasket material and make your own. if your cup doesnt have a hole in it, just reuse it. i think those are a stainless alloy.if it has a hole in it enquire in parts wanted. i am sure somebody has one of these manifolds tossed in a scrap trailer, or behind their shop. maybe they will send it to you for free plus shipping.