[Aussie Mike]

Hi John,

The engine in a Cobra sits about level and so should the carb. Most of the aftermarket manifolds have a slope on the carb flange to keep the carb level as most regular cars the motor tilts back.

Having the carb on a tilt probably won't affect performance, it's just a cosmetic thing. If it was me though I would machine the carb flange flat, weld and re tap the holes.

Cheers

Mike