Hi Chris,
i 've been there, done that with my 1300 in the past, having tried all sorts of carbs, single HS4, twin HS2, Single HIF44, and finally back to the single HS4. With the right needle (most important) it has all the low down torque it needs to pull strong on a 3,1:1 final drive :wink: , refinement, economy and emissions are excellent, while i don't think it had lost much in the top end. It suits my driving style anyway.
It makes me wonder why Rover went over the top with the TC and made its life difficult by using the 2 inch carbs. I know about the cable throttle, but i will worry when i will have all the parts in my hands. I also have mixed feelings about the HIF range, but i would prefer to start from a complete 2200 setup, rather than gather parts for mix n' match. The needle selection might also be a problem, as perhaps the needles for the 2200 will be rich for a 2000, but i thought of the late 2000 TCs for the Italian market. Perhaps these cars used also twin HIF6 carbs, so this could be a starting point.
Demetris