Centerlink ID

hey crackedback i just got under mine and it looks like from the center two holes they are about 17-1/2'' center to center and the outers are about 21-1/2''. the drop is about 1-3/4'' for the V8 link. the measurments might not be dead on but close as i couldn't find the jack and i'm a little fat to get all the way under it.