I was able to install mine without cutting the engine cover. The hose is pinched just slightly, but not enough really to be concerned about IMO. It was a bit difficult getting the hoses positioned correctly in order to get the catch can in place, but it definitely can be done. I felt if the J-hose was about 1/2" longer it would make it easier to position the catch can. If you were to trim the engine cover than the hose is plenty long, but with the cover untrimmed it is a tighter fit.
Here's a picture of my install.