I run one on my 331. (Hey, that rhymes)
It’s definitely a higher RPM intake, not to say the car is hurting for torque down low, but I will tell you the car pull all the way to redline like a banshee.
You still need to take the upper intake elbow off to remove the passenger side valve cover, but since the 4 bolts/nuts are right out in the open, it’s seriously a 30 second job.
However, if I could do it all over again, I would get the edelbrock EFI intake they just came out with, cheaper, and the fuel rails look a lot better.
The intake does get a lot of compliments though, and when you see a car that runs it, you just know the thing is built extremely stout.