Keith, if it's an ARF could you mount it upright and order a new cowl or repair that one. You could try it without the cowl to see if it fixes it.
On my 60CR the tank is about 3/4" above the carb but I use a bladder tank. I really have a love/hate relationship for those tanks. I hate the way you have to fill it but I love the reliability I get from them.
I did notice on the CR it wouldn't hand flip at first but with a half gallon through it I can hand flip it.