I have been struggling with the same manifold - carb question on 9193.
As is it has a Holley 600 CFM list 9834, model 4160 mated to a aluminum manifold that says "Performer" on it. I don't think this combo is period correct but I suspect that at that time (1980 GTS + - ) the Tomaso people were installing anything they had laying around. Records on this car are scares at best. The Swiss fellow wants $60.00 to tell me what the original engine was. All he has. Not sure I want to pay that for what I think I know. The engine has never been out of the car.
Do you guys think it's original and is spending the sixty worth it ? Think I'll have to sell the car due to California smog and registration laws so I would like to know what " original " is. Everything other than the carb and manifold appears to be stock and that's why I bought it. An original survivor that I want to keep that way.
Thoughts ? I don't mean to hijack this thread.