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hi ,
Which size carby does Al use for the big block ??. His comment for the small block is that he only uses the non pump carb was due to pricing . The tm pump carbs are a little pricey . The benefit is very good throttle response way better than any non pump carby . A pumper carb is mechanically connected to your foot but a non pumper is only vacumn sensing reaction so therefore changes in fuel metering are slow . The use of a single 36mm would be the smallest carb I would use but there are 4 things at play here
1 / it is not a high reving engine
2 / does not have highly efficient cylinder heads
3/ having the largest carburetor is only good for one part of the rev range
4/ the buggy is heavier than a motor bike, torque is equally as important as WOT hp