Greetings,
Wasn't sure if you were looking to do a 1/350 scale or 1/700 scale Intrepid. So, I went with what I know on the 1/350 scale front.
I did a lot of the research a while back on WWII Essex Class but did not pursue Intrepid so didn't really document it. So, from my old memory, in 350th scale, early Intrepid is Trumpeter 1/350 Essex. Like Essex, Intrepid was commissioned with one catapult and a single 40mm on the stern. Model Monkey does a 1/350 Island that captures the early period nuances as well. Kind of depends on how deep you want to go...ie. higher accuracy = $$$
After Intrepid went back to Hunters Point, she got the second catapult and the second stern 40mm. There are some differences in the island as well. Radars, antenna, etc.... The 1/350 Trumpeter Yorktown or Franklin Kit is good for the later version. Not sure when Intrepid got all of the extra 40mm that most Essex Class WWII Carriers got through 1944/45. I don't remember if there is really a difference in the details of the Yorktown or Franklin Kits, but I thought that they were a little different in the island/mast details. There are reviews of both kits out there so you might be able to glean some pointers there.
Every Essex Class Carrier in WWII was a bit different as the war went along so research is paramount if you are looking for accuracy. Also, even with all of the research out there, you will likely miss something so at some point, once you have the big details captured, enjoy the build. It is likely that nobody else will see the issue, if there was one, well, except Tracey so just don't let him see it ...
Good luck,
Mark