On the 40 I did for best friend and my 37 I relocated the radiator forward on the support to get me more room for the motor, but when you more the support you throw all the front end parts location off. You are going to have put the radiator support back to the correct location and move the radiator. On the 40 we move it to other side support mounting point and put some spacer on it, we also had to modified the grille upper filler pan at the rear so it would not hit the radiator. I agree with 46gmcpu that yo will have change where you mount the radiator to the support on the 46. Send pictures and good luck
