360 motor mount measurments

does anyone have the specs from the flat side to the center of bolt holes on mounts for 340-360 for both sides to fit my 71 dart . I have a set of Van mounts for 360 i can cut and redrill for my 1971 Swinger if i had the measurements! Thanks for your help. P.S. i know you can buy them just thought id try and save some cash where i can! Just need to redrill the holes lower in van mount and cut off the extra.