Uhhhh sorta.... The 2 - 3.5 and SOME of the NEWER 4 horse flatheads are the same block.... Typically 2 - 3.5 and 4 - 5 the OLDER 4 horse and the 5 horse flat heads are the same block.. But yes, this one is the exact same part.. It's funny you'd say something about it.. I just brought it in and double checked the cam. It's the same as a 5 horse.. One thing I wanted to ask was #1 what is your code number, and #2 it is a standard bushing crank, yes?