are they supposed to be stock relacements? or custom for our application? or just a custom install? drilling simply requires a sharp drill bit and a steady hand, the existing hole will act as a guide, although a drill press is always my first choice ( i have one), not everybody has access to one. can you show us a picture or a link to the jcwhitney part on their web? i replaced debby's with an ISO type, from streethawk, firehawk,,,,, "something"hawk, previously reviewed and reccomended here, they were are "bolt on" no issues at all.
oops, i'm logged in on debby's log-in
jay