Quote Originally Posted by 34_40 View Post
Welcome to the site. Do you still have the old head? I'd be wondering if the "thickness" of the heads are the same.?.? Did you compare P.N.'s ?? Or did you compare the heads side by side at all??
Yep, I was thinking the same thing. While the stud height is the same head to head I'm betting that the new head is shorter from that base of the stud pad to the machined surface of the head making your pushrods too long. Pretty sure you've got two different head designs, not that it won't work if you set it up right.

And welcome! Let us know what you find.