...man; except the 500 racers the definition of the bonneville is the twin carbs...
In most models with the splayed ports look fantastic and perform good as HT is saying and you have this idea? Honda four with one carb? cmon

HT; possibly more fun in small trip with curvy roads etc but I have a buddy here with a T120r and they say that they are not perform better in longest runs at top speed (too much for the 4 gear) etc
He has also a 78 750 fitted on a mid 50s frame and he say that is faster.
More RPMs to keep the same speed and that is too much rpms in my book to keep constant 120-130km/h for 2 or 3 hours as I do.