The threaded bolt holes didn't line up with the coresponding holes on the drive plate. The first bolt was fine, but then the next three went from roughly 1/8" to 1/4" off. I probably should've sent the POS back to South Bend but I elected to take a die grinder and notch the holes wider on the drive plate. Hopefully it'll still be centered once we get the tranny up in there. If the tranny-to-block bolts line up just fine then it should be ok. If not then we'll get our money back and get a ClutchMasters. $500 for a clutch and it should NOT be this much trouble to install. I won't buy from South Bend again, regardless of how well this clutch performs.