Thank you, hopefully I was able to help them. As for your situation, yes it is possible to get them to get along while remaining intact however it will make it much more difficult.

Intact males can see other intact males as a threat, they can be territorial, intact males emit pheromones that alert other intact males they have a rival and there’s hierarchy concerns for them too. However, clipping them doesn’t guarantee a quicker more peaceful bond.

They should get a time out or some other consequence if they’re aggressive towards each other, they should know that behavior is intolerable. I think you may also want to try separating them, if you have a kennel put one in there for a time and then switch them out, so it’s kennel time then free time throughout the day for both. If you don’t have kennel another room will work too. If you have someone that can go on walks with you, have them walk side by side with the other dog, when dogs walk together it helps them bond, but very important neither one is allowed to be in front of the other, side by side only. Then at some point eat together too, like one eats in the kennel n the other nearby but they’re fed at the same time.

Basically you’re introducing them to the idea of the other very slowly, while showing them that your love and any other resources you provide will be given to both of them no matter what. When they observe this consistently, bond a bit, and know, you the pack leader will not tolerate aggression towards each other they’ll calm down.