if you want to use a girdle with the new caps, this is probably the best BB mopar girdle kit you can get.
from bcrproducts:
these require the line bore like the other kits, but you also have to have the oil pickup extended slightly since the oil pan actually bolts to this girdle.
http://www.bcrproducts.com/
if you call them he could tell you anything you need to know about main caps lol
but yes you will need a line bore on the mains with main caps installed when you swap