I checked out the dealer site suggested by jdmoran (www.gessweinmotors.com) and looked through his Imperial inventory. One of his 61s (with 20,000 miles - yeah, right) has a photo of the engine compartment and it clearly shows the exposed-bellows type of brake booster. My 57s had these but my 61 has the enclosed can type bellows. I don't think I have seen the exposed bellows on another 61. Fellow 61 owners (and near years), what type of bellows do you have? My car is an early production (#394) so it doesn't seem to be a parts carry-over issue. Ken Miller 61 and 67 Converts