I had Head Quarters parts on my Lowrider. They did not do the heads correct and after waiting over 2 months to get them back the first time I was not sending them back to them. Instead, I just decked the heads myself and installed them. Afterwards, the bike ran great. More of less running the same set up as you are looking at. I had a Mikuni carb on the bike. Take a look at the dyno run attached to my signature. This thing pulled very hard and would embarrass those little rice burners from time to time. Tough to keep the front tire down when you crack the throttle hard. Passing cars and on-ramps were a lot of fun.
Randy
Randy