Yes, N/A on 91 octane.I have eyeball the JK motor I think it might be too wide for the Cobra. I have not actually taken measurements from an example of each though. That will be pretty darn sweet in your’69 btw. Is 830hp n/a?
Yes it's a thicc motor. However, I have seen a 427 SOHC in one, and knowing that a Boss 429 can fit in a car where a 427 SOHC was, I'm guessing it would fit. I can't find a side by side pic, but the SOHC seems wider.