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Hello again, first you will need to maintain a driveshaft angle of about 2 degrees with the pinion up and the tailshaft down so they are parallel or you will have vibration. You do not want to have it at 0 degrees but no more than 2 degrees and the angles have to be equal.
The carb can run at quite an angle, think about going up and down hills, you just have to adjust the float so there is headroom in the bowl and the fuel is not sloshing out the vents.
Please let me know how I can help you with this but get the shaft angles right and work from there