LOL say hello to sawzall on your LR4. They may be the type shop who's approach is "if you want it, we can do it" which is great but also dangerous if you aren't on the same page and care what things look like upon completion and actually function like under extreme situations, like avoiding a deer or collision at 80 mph or breaking stuff on a trail so you're in a real mess.
The ONLY way a 33" 305 will be 100% usable will be to cut more than anyone else has cut that's been trying to educate you on this. You're trusting a hack shop who are in fact not experts on this vehicle even though you claimed at the beginning they specialize in land rovers or only work on rovers.
All they are interested in is your checkbook dude. I'm not trying to put you down but you've ignored all the input even though you asked for it.
Either they cut the heck out of your fenders and bumper or this tire won't work, period. By work I mean, you could say you have a size 11 foot but can wear a size 14.... You'd look like a clown standing around or walking down the street but you could 'wear' them

However, the point is how well would that function hiking...?
There are limits and this tire is past the limit, plain and simple, without cutting away the stuff it'll contact.
Your easiest driveway/shop fitting test will be to deflate all corners and then flex up a front wheel on even a short blocking like ramps, then turn the wheels.
A full droop test will also need to be done then turning. Independent suspensions do bizarre stuff at the two extremes.
Like I said, I did test fitting of a 305 and it was basically not going to work in rock crawling under full flex without cutting the ARB bumper and some other things well beyond the normal cutting and reworking to fit a 10" wide on 8" wide wheel with snug offset.