Milodon windage tray studs defect/issue

Used a 1/2-13 bottom tap, same as head bolt threads.

Got my answer from their support line. I need their 6" tray stud kit 81151. My 81182 kit is 4.5" and according to them some, but not all, 318s will take that.
Still hard to believe that will clear the crank.
But with my 2" tall caps and 1-5/8" deep bolt holes I need their kit #81151 with the longer studs.
View attachment 1412720211756.jpg
Hope this will save someone else from the same issue.