Questions on Stucci Luigi Crash Bars Installation

New owner here, gingerly getting to know this beast. I bought these crash bars but when I looked at where they are supposed to
be bolted up I decided I needed some wisdom. So, I see that the front bolts and the long rear bolt appear to hold up the engine.
I expect that the best thing to do is support the engine, I have a hydraulic lift for that.
Also, the rear brake reservoir needs to be removed and the starter cover, all doable.
What I need to know is, will I have a difficult time getting these bolts back in? Is the engine going to move on me?
Obviously, some of you have done this, so tell me how it went. Easy or nightmare?

Thanks

Don't want to break anything while we get to know each other...

I had the original Stucchi bars and replaced them with the new ones. No problem with the engine shifting or replacing the bolts either time, I just did them one at a time.

The issue was torquing the front engine mounting bolts. I could not get my allen wrenches in there and still connect to my torque wrench. I just guesstimated the torque and periodically check my paint marks for movement.

I also got another response that said to install the back long bolt first. I have a wobble adaptor for my torque wrench that I could use for the front bolts, also some extra long hex sockets. Will go ahead now. Might as well make it mine some time.