Originally Posted by solent spence
Just fit left hand and right hand props, which will give you the best result
Errr that might be fun if one of them doesn't have a counter rotating gearbox.....
As Andre says, ref. the size but if you really feel you need symmetry have a dig around the microfiches. Some manufacturers carried gearboxes across that sort of HP range, so you may find you can take a couter rotating gearbox off a 115-ish & park it on the bottom of the leg of a 90.....
Will need some research tho'.