+1 to above, CV carbs are design to work with right volume of air, installing pod filters + straight pipes will make a mixture too lean everywhere but on idle and max revs. You will need some dyno sessions to find out how to re-jet your carbs to male a bike operational. It was never a way to make a bike more powerful but noisier, you need mufflers to have proper low revs and a way to get to higher revs.
To make this engine developing more power you need bigger cylinder block, different cams and reworked cylinder head, and I never heard or read about those parts made for a Hinckley Triumph. They are certainly completely different from our old stuff being DOHC engines, so you can't adapt our "big block" to your engine. And Meriden Triumph big block is actually 750 ccm.