I do grind and fits all he time. adding that much to LOP with a pad will be difficult, but I know of a place that makes a nice vintage repro pad that is an 1 and a half. The process is too long to type here but if you PM me I will give you my phone number and tell you how to do it while you take notes. Go here...
http://www.csmcspecials.com/SearchResults.asp?Cat=18 for some nice grindable pads the long one is about half way down.