Whilst shopping ebay, I came across a power brake booster at: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4602986073&sspagename=ADME:L:RTQ:US:1 Trying to be helpful, I sent the seller a note that it did not look like a '55 booster to me. He sent the following response: Hi, This unit was removed from a 55 Imperial, And I know 56 units look the same..but they also used a bellows type that looks totally different..however ether one can be used..thanks Mike For my edification, were there different-type boosters on various DeSotos, Chryslers and Imperials in 1955? I got the impression they were all the same and a one-year Kelsey-Hayes experiment. C-300'ly, Rich Barber To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/