just a word of caution, that carburetor is way too big for the engine, which will result in poor low end, and mid range. top end may be ok (e.g.. 5500+ rpm) but the rest will be kind of crappy. You typically see 22mm round or flat slide carbs as being good performers. You wont get sufficient vaccum and air speed through the carb for it to do its thing properly. I was on NR racing today, and the oversize carbs for engines that go 8-9k rpms are 24mm, and if you go methanol thats the only reason to be that big (but thats with a large valve in intake and large valve in exhaust). Even then, russel basically stated that the performance of heads with valves large enough to support these carbs is hurt, and that the smaller valves would work better.
