Any issue for putting in a larger Radiator ?

You are always better going with more area than depth on a radiator. I would use a three row for maximum cooling capacity.

Thicker radiators have more flow resistance, that's why area is better than depth if you have a choice.

Shrouds will help direct and pull the air through the radiator.

I would try to order the correct factory molded hose if the outlet is in the same location, and see if it will work with the slight angle...

A flex hose will work, but not as durable as a correct molded hose.