5.9 Magnum flex plate too small??!?!?!?!?

I was told that i need to use my factory 360 magnum flexplate to install the motor in a an a body with 727 transmission and that id need to wallow out one of the bolt holes, but theres no way in hell this flex plate will ever fit, if you line up one hole all the other holes are completely off the the flexplate alltogether, its at least an inch too small in diameter, if you line up a hole the center piece is way off...need help what do i need????50827962_1975748865827605_3237647713247952896_n.jpg 51032885_2206225849594360_603843595471945728_n.jpg