The R/M kit does have its challenges. Aside from the above mentioned thinning in various places to make more of a scale appearance, the main landing gear is too "squat" on this kit. There was an aftermarket replacement produced, will possibly be hard to find by now.
Another issue with this kit is that it takes a bit of reworking if you ever intend to display it with the canopy open. The "ears" on the back edge of the canopy--as well as their cutouts on the fuselage--are not correct. The"wing fold" had a habit of poor fit. Every time I ever built this kit--and I built a bunch of them--the upper wing fit was better than the lower. If you intend to display it with the wings folded, I would recommend against it. The more common stance on the ground was to have the wings folded, with the variable incidence wing raised and the flaps and slats dropped. But this model does not give you the option to drop the flaps and slats, or to raise the wing. Not only that, but unless you really just want a very basic looking model, the wing fold is super plain on this kit, and you would want to add a lot of detail there. If you decide to go all out and raise the wing, be sure to drop the flaps and slats, as they would automatically drop whenever the wing was raised.
The shape is basically about right, what most would probably call close enough. There was an aftermarket resin cockpit set made by FM for this one, which would probably be close to impossible to find today.
Now, on to some other issues. The Crusader was built in a few different variants. With Crusaders, if you're looking to build a specific example--for example, my dad was a plane captain on one and so I built his plane--you will want to research that specific bureau number. There were different upgrades and different electronics installations that can affect the size and shape of, as an example, the top of the vertical fin. Fighter versions of the Crusader had, if memory serves, three different antenna options near the top of the fin---or, as in earlier jets, there could be no antenna installed. Each one provided a different "bump" or "blister" fairing, so if you're looking to accurately build a specific jet, you're going to need to check for photos to see how that jet was equipped at the time you are trying to represent. It's important to note that the kit is designed only to represent an F-8E model. The -J had the same nose as the -E, but had other modifications such as different size tailplane and double-droop slats. The earlier -A to -D models had a slimmer nose. All -A to -C models and some -D models also did not have the hump fairing along the top of the wing either. Some -D's did have it installed. The windscreen was also different, depending on which nose was on the aircraft and whether or not it had the IR sensor installed.
Remember to have filler on hand, you'll need it. Remember also that if you're building a Navy version, the USN birds very rarely carried bomb racks on the wings, but the USMC birds carried them far more often. The Y-racks for the sidewinders are rather wrong in the kit, and I've seen people just install the single sidewinder rail on each side instead.