I picked up a 1990 Mustang that has had the original 302 engine swapped with a new (rebuilt) one. I have no idea if it's a roller motor or not, and wanting to upgrade to some GT40 heads and a matching E303 Cam, and don't want to tear it all apart just to find I don't have a roller motor.

How can I physically identify whether or not a 302 engine is a roller motor? I've heard that you can pull a valve cover, and look down the pushrod or lifter (not sure which) with a bore scope (which I...

How to tell if my 302 is a roller motor or not