Higher compression octane requierments

Yep, how such squeeze and the cam will make all the difference. I'm in N.E. Ohio and run this Lunati 10230703 cam with Speed Pro H116CP pistons in a 360. Block is decked so they are level with the deck. Heads are 71cc. I can use 91 octane no problem 89 and it will ping. Runs great. I used to run a xe268 Comp Cam and no matter what I did it rattled. That was the only change and it is a completely different animal.