hey Frank, check out Ilsco.(www.ilsco.com)
they have lots of different "lay-in" type connectors for tapping, even for the sizes you are using. (never been a fan of split bolts) or like bossman said, try lug kits. just a suggestion.
http://ebusiness.ilsco.com/webapp/w...Id=-1&catalogId=1&categoryId=132

they even make covers for all their different taps/connectors.

(editted to add link)

[This message has been edited by goodwill (edited 01-26-2006).]