how do I tell whether these have 3.5" bolt spacing?

[}{arlequin]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33590&item=7947576504&rd=1&ssPageName=WDVW

thank you.

edit: generally, what's the difference between koni and bilstein struts? do they each accept only one type of insert? (ie.: koni w/ koni, and bilstein w/ bilstein?)

[Rot 911]

Only way to tell for sure is by measuring between the two caliper mounting holes, between the black lines on the picture.