it may be i wish i could find it i have a set that was redrilled to the 4 1/2 by someone years a go i think if the 4 in holes are plugged with a solid plug it can be redrilled and then taped for screw in studs not press in then all the kelsey hayes parts can be reused if you dont have the parts then yes its more logical to install the 73 up brakes that widens the front wheel track that to me takes away from the look of the car that is just my opinion thanks for all the input
