Even if the technology had changed significantly since the 70s, I don't think that these carbs would be tuned to the specific needs of your ride. You'd need to know more than I do about airflow, fuel mixture, backpressure, etc. etc. etc. (see about 1,000,000,000 posts on carb tuning) to get them to perform better than with the ones those crazy engineers from the 70s designed. Of course I've tried to drill out my mains with a B&D wood bit so I might not be the best to have an opinion
