i just put 18x7.5's with a 40mm offset on my truck yesterday and they fit great. i have 4x4 metal but it looks like you'd be fine with 2wd metal...plenty of clearance. im running 215/35 rubber. i got my wheels from ebay
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=024&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=370007945599&rd=1