I weld cast everyday. Your carb was probably cast steel if it did so well. Your other pieces might be cast iron where you might run into a problem welding with 70 wire. Everybody yells preheat. I've done it with none with good results. I'd try a stainless rod. 309. Either way, if it's steel or iron,...

Hi and thanks for the membership. I'm a Tool & Die Welder for General Motors. I worked at fab shops before this. If I need help or can give help I hope to do it. Thank you