[twobjshelbys]

Originally Posted by patrickt

Well I had to see if you were right. Here's the page: https://www.roushperformance.com/engines/427-r.html They do tell you that the stroke is 4.0", so I guess the bore has to be about 4.12" -- you'd think they'd at least give you the cam specs, but I couldn't find them.

Here is the cam spec I was given for the 427IR (which is supposed to be the same as 427R inside the box).